Why do men like to have sex with a woman's ass?

The answer to basically any question of the form “why do $people like $sex_thing”^1 is “because it’s fun.”

2. Giving, anyway. I’ve always been a big fan of receiving, which is why almost all my lovers have been quite skilled with a strapon, and I even own a patent on a new type of strapon.

1. Yes, I prefer underscore_notation to camelCase. It’s easier to read. Change my mind.

Why do atheists demand that everyone must accept their own self-definition? Is that any different from demanding others must accept their choice among 87 genders or be labeled as a bigot?

3. Yes, this does mean I’ll do things during sex I don’t necessarily actively enjoy myself. I think one of the hallmarks of a good lover is willingness to do things that get your partner hot even if they don’t necessarily rev your motor.

Why?

I now have a lover who is a passionate and enthusiastic fan of anal sex, and she has an ass that is…um, extraordinarily accommodating and a great deal of fun. So, for the first time in my life, I have a partner I actively enjoy giving anal sex to.^3

When a dog smells another dog’s poo or wee, do they then remember that scent for when they smell it again, or even further know which dog they are smelling if they know the dog?

Throughout my life, until just recently, I’ve had girlfriends who enjoy receiving anal sex, and I’ve always been willing to do it, though I’ve never been a huge fan; too much work for something I personally didn’t find particularly interesting.^2

Because it’s fun. That’s it. It’s enjoyable and feels good. It’s really not rocket science.