he does have a point

Girls bleed excess vaginal blood and skin materials, as well as eat spit and vomit with their mouths, yet dudes have sex with them there...it's a matter of cleanliness, and you can clean an asshole pretty well.

You're wrong. Women can have the most intense orgasms from anal sex with the right combination of clitoral and G-spot stimulation. It's because the G-spot is located on the wall of the vagina that separates it from the anus. So if a man were to stimulate the G-spot with a vibrator and simultaneously have his PENIS rub against the sphincter the walls of her anus, he could bring her to a bone-rattling orgasm.

Also there are reasons why anal sex is appealing to people. It has to do with the "oral and anal pleasure stages" of our childhood, but I don't feel like writing a wall of text.

Anal and vaginal sex should go hand-in-hand. And women should have greater pleasure from anal sex consider how close the G-spot is to the walls dividing the anal and vagina. You only hear complaints because most men don't use enough lubricant.

Somebody doesn't know about sexual anatomy.

If she would put up with it I would too. just sayin.

Ever taken a shit that wasn't rough? Anal sex involves a lot of lubricant and can be extremely pleasurable for both parties (when proper measures are taken, i.e. an edema and lotsolube),

I love you.