I'll be honest I don't find penises attractive, I don't really get what the fuss is about. Balls either, they're more silly than erotic. I'd rather not look at or interact with either.
(My penis doesn't count obviously because that's me, and touching it makes me feel good so I'll keep doing that)
Now I WILL if a femboy is sufficiently cute imagine them swelling to exploding, because that is my fetish; but I will minimise/ignore the penis part of them.