Subnostr

If it was as horrifying as you imly it to be, it would activate a fight or flight instinct. Adrenaline would make his dick go soft and shrink a bit. It's not, though. Most boys who go through it don't complain about trauma or crap. They aren't faggots.

Anal onto the boy would be sodomy. I an talking about regular sex.

If the boy doesn't want the woman, he can just say no and move on. Most women can't force even young boys to stand still.