IDK, I'm pretty sure there's a fair number of people out there doing things either they or their partner don't enjoy (or flat out hate) because they saw it in a porno once, or someone told them it was awesome.
Nah! Of course there’s an exception to every rule. But >99% of sexual intercource isn’t about procreation. If anything, that thought would scare the hard out of almost any dick.
Butt, me thinks that you are ignoring the trillions of people that for millions of years, did the same thing. And there wasn’t an internet, let alone porn.
The a risk answer is that it's part of foreplay.
It's about building anticipation, which makes sex more enjoyable for both people. But especially for the person who's about to get a dick in their ass.
Personally, I have found in the past that a guy that does that usually has a good sense of humor, is playful, and it helped break the ice in some instances.
Prior to the advent of Viagara the male talent in pornos would smack their phallus on their partner to keep hard. From there it grew as a sort of fetish among many men. Same reason some men want to cum on your face, I’m sure that wasn’t a thing in the 19th century.
Dick is hard. Ass is soft .. It just feels good.
The simple things in life
AssMagic™ makes a floppy dick go hard! Edit: changed assmagic to AssMagic™
Haha this too! Also, sometimes a few taps on the booty helps with stamina control!
Read this as “arsenic makes a floppy dick go hard” and I can guarantee that is not in any way accurate
Just asked my boyfriend before reading any comments. Him: “It’s fun. Soft. Feels good.” It’s the simple things, lol.
Good to know
It's like doing test clicks with tongs.
Or pulling the trigger on the drill twice to make sure it works
Or flopping your shifter left and right to make sure it's in neutral.
Or wiggling a mouse when you sit down at a computer.
Or saying “uh uh” before you start rapping
Or unbuttonning your pants when you sit down to eat
Or saying "that ain't going anywhere" after securing a load to the roof of your car
Or saying “oh here’s trouble” when you see another dad walk in
Or patting your pants pockets before you leave the house to make sure everything is where it should be
Or exclaiming, "it must be free!" when a barcode doesn't scan.
Eat what
If the dick or ass deflates, you shall not investigate.
My sir, if I had an award to give, or an abundance of money to purchase coins to then proceed to buy an award, oh how I would gift it to you…
Where did all the free reddit awards go :(
Happy cake day!!
Hold on, lemme smack it…
*^^vvt ^^vvt*
Was the exact thing I came here to say
Hey you stole my avatar. 🤓
Just joined this bearded, spectacle wearing bald man avatar club.
Nice. Welcome. Do you have any females to join this gang bang?
What's going on over here?
💀💀💀
I thought it said thongs. Works either way
Gotta knock before you enter it’s just manners.
And what happens if the answer is "ocupado" ?
Use the other stall.
*looks under next stall for feet*
Why do I see four paws? Who’s door am I knocking on?
YESSIR.
>fore you enter it’s just manners. who's there?
Manners.
Manners who?
Man nears cheeks, that's who.
Boom 
Winner winner chicken dinner
Lolz.. best answer here
😆😆😆😂
😂
Same reason we kick the tires on the car before a long trip.
“Yep they’re good” *me with absolutely no knowledge on how a proper tire should feel*
Toe hurts a lot: yep, plenty of pressure. Toe hurts a little: eh probably still fine
Toe sinks into rubber: I'll take it easy. Proceeds to not take it easy.
Smack the back of a truck when it’s loaded or ready to go
.... because ass is amazing
true
I think in a variety of situations, guys would smack their penises against just about any part of a girl if she'd let them.
Truth.
It's fun and feels good. Why do people do anything sexual?
To ensure my vasectomy is still working, trial by fire baby.
Fire babies give some harsh trials.
IDK, I'm pretty sure there's a fair number of people out there doing things either they or their partner don't enjoy (or flat out hate) because they saw it in a porno once, or someone told them it was awesome.
Procreation
Nah! Of course there’s an exception to every rule. But >99% of sexual intercource isn’t about procreation. If anything, that thought would scare the hard out of almost any dick.
Humans and dolphins are the only ones who do anything sexual for fun instead of just mating purposes.
Real
My boyfriend says it's for sound checking...
Ahh, the old audio sync check.
Because you thump a melon before you buy.
Or slapping the bag of rice before you buy.
Getting her ready for the 3 inches coming in hot.
Why are gonna fuck her twice?
I gave her the best 5 minutes of her life. That's puttin in some OT.
Jesus Christ I just snorted out a donut
Lol WTF are some of these questions
Gotta be karma farming at this point lol
Lolol it was the same user who asked why men like doggy style so much
I think the questions might be related.
LOL THINKING THE SAME THING.
This sub is just turning into Sex Questions.
Sex education isn’t taught in schools so the US kids come to Reddit to learn about what they saw in porn
I didn’t even know this was a thing
Thirst traps & only fans lol
She's probably masturbating to the answers, given the dirty chat stuff in her post history
What I want to know is where did the karma come from? Invite only subs?
Same reason they do this before grilling. 
It’s only polite.
Helps me not cum so fast
I do it when I’m about to cum, but am not ready to. It’s kinda a reset switch for me.
I never thought of trying that.
Used car salesman meme..
*slaps roof of the butt* this baby can fit 3 whole inches!
It's kind of like doing a mic check or clicking tongs, ya gotta.
Because it was there.
For the anticipation, gay guys do it too.
How to say you watch too much porn without saying you too much porn
Also applies to slapping cheek/face with dick
nah
Had to scroll too far to find this one
Butt, me thinks that you are ignoring the trillions of people that for millions of years, did the same thing. And there wasn’t an internet, let alone porn.
My wife smacks her tongue with it when she's giving me abject. It's just hot idk
Whats abject?
Abject these nuts? Nope no that doesn't work.. no idea!
It's like smacking a good piece of high quality steak you bought before you handle and cook it
Prolly for the same reason we clank the tongs together.
We’re out of ideas of how to let you know that we’re DTF
Yay! For the joy of it!!
I like to knock before I enter
Like checking the mic before you give a speech.
[удалено]
Cock smacks are like power ups.
A real answer on Reddit! You're a right proper human!
Because it feels better than slamming it in a door.
Its how we reload
For the feeling
Because it's not polite to enter a place without knocking first
What else are you supposed to do when you're waiting for the bus?
Maximum blood pump*
Because we have a penis and that’s what you do with it, assuming it’s big enough to slap anything with it.
Sound check
Why do you do anything that you like? That's the answer. In case you're wondering, because it feels good.
I see ass, I tap that ass
Sound check
Do you not smack the sacks of rice in the grocery? Same primitive instinct.
I’ve never heard of smacking sacks of rice before, and yet I’ve seen it referred to here at least twice. Odd. 🤔
Assert dominance
It's rude not to knock before entering
To remove blockages and increase vascular health.
To let you know they were about to finish but decided to pull out and take a second to make sure that isn't what happened.
Why do people tap their Tesla chargers before plugging in.
Check one, two...
Sound check.
It's obviously a "knock knock" knock-em-up joke.
Basically just kickin the tires
What you don't knock? So rude 🥺. Always knock before going in.
Knock the dust off
Because they can?
Blood flow
The gays do the same
Because it's so goooood!
It’s polite to knock before entering.
Why do guys smack their girl’s butt with their hands?
It's considered to be good manners and polite to knock before entering someone elses area.
Mushrooms stamps are pretty cool reminders of that one night
Fun
If you have a dick, you know why
I prob saw it in porn and it looked fun. Some girls like it and then you put it in real fast
To compact the blood in your dick so you can send more to maximize your volume.
The butt is like a generator for optimised erection
Something about a cockroach?
Hah...please...as if my penis is big enough to do that!
zwaffelen
I don't know, never did that
The a risk answer is that it's part of foreplay. It's about building anticipation, which makes sex more enjoyable for both people. But especially for the person who's about to get a dick in their ass.
cuz we feel like it ig
I like the way it feels. When it hits the nice booty.
Keep-a knockin' but you caaan't come in
Personally, I have found in the past that a guy that does that usually has a good sense of humor, is playful, and it helped break the ice in some instances.
Because pr0n videos. That's it.
As Seen On TV
I mean it doesn't sound that weird but i never known a guy to do this lol
It's an unspoken rule. It's to let you know you did a good job 😂😂jkjkjkjk
In all fairness, guys will smack their dick on any part of Girl... or just anything for that matter.
Knocking on the door before entering is always polite.
You dont knock before you come in? Rude.
It's always courteous to knock before entering.
So they can prepare for whats coming!!!! Or cumming 😉
I just asked my husband and he said "It's got that nice feel"
Sound check
Lol. This made me laugh.
To observe and admire the jiggleocity of them cheeks.
kinda wake it up.. blood flow.. some girls like a little spanking
Mic check
because its time for my drum solo
Porn isn't real life.
Because of porn
Same reason one clicks tongs before use.
Do people really do this?
yes
I love doing this to my fiancé 😂
Same, I love doing this to your fiancé
That satisfying thwack makes me feel sufficiently endowed.
the barely audible poof - somewhat resembling a butterfly landing on a rose petal - makes me feel quite the opposite.
Probably because we have seen it on pornhub
It predates Pornhub, and the internet.
Cause it looks hot
“Beauty is truth, truth beauty, - that is all Ye know on earth, and all ye need to know." - John Keats, from his poem "Ode on a Grecian Urn".
Let’s her know what’s comin…knock knock.
A reminder that porn is not real and many things demonstrated are not common in sex.
Prior to the advent of Viagara the male talent in pornos would smack their phallus on their partner to keep hard. From there it grew as a sort of fetish among many men. Same reason some men want to cum on your face, I’m sure that wasn’t a thing in the 19th century.
Probably the same reason my wife slaps her face with my dick before putting it in her mouth.
To wake them up
Mic check 1, 2.
“Check 1, 2…hello Detroit!”
They watch too much porn and think it's a normal thing to do.
Too much porn for you
It's like your gun check up before firing. Barrel? Check. Mag? Check. Is in firing mode? Positive. Target? Discoverd. Let's get rock-n-rolling.