same thing could be said about guys! if you want to generalise.
Although i have never had anything in my butt before, many guys have reported that anal stimulation via various means is very pleasureable, but guys don't like to admit it or try it due to a "gay" stigma.
I am yet to fully try it out myself, namely cause it's a little awkard me doing it myself, but maybe via other means?
Although i don't get turned on by guys, so i don't think it'd be that way
prostate stimulaiton is meant to be one of the most pleasureable things for a guy, so i would have thought heaps of guys would be trying it out. SAying no to your SO is wrong as well, especially if you want to do it back to them!
it's all give and take!