>>533979908
it's true men get more out of it than women do, because there is no greater sensation than that of prostate stimulation, and doubly so if it's a woman doing it to you, feeling her weight slamming into you, her grunts of exertion, etc
however, it still provides friction because they are griding against the harness, and because of your asshole's resistance the friction increases when they thrust. they also make pegging dildos, that are double ended with her end being a vibrator or g-spot wand or something
it's also just sexy for them, in the same way that we find it sexy to fuck women, and as a bonus a lot of women who peg have mild gender dysphoria so it's like living a fantasy for them
my ex used to peg me regularly and I asked her the same thing

god i wish i was that peasant