From what the o.o read, the feelings or fantasy isn't so much a man but the act of penetration. Fwiw, women commonly find anal to be pleasurable. There are more straight via guys who indulge in anal play of some sort then one might imagine. Not saying a majority, but enough to make it common. So while tgis may be tied into your cding, it could also very well be that it feels good to you simply because it's somewhat common among both genders and all specialities that it does.