Is it normal that i had these sexual thoughts?
When I was a teenager, about 16ish, sometimes when I'd stay over my best friend's house, his younger sister who would have been 14 then would sometime sleep on the couch in the living room. My friend's room was in the basement so whenever I needed to use the bathroom, I'd have to go upstairs.
Long story short, whenever this would happen, I'd always have this thought of sticking my dick in her mouth and see what would happen. If she'd freak out and bite it off, start beating the shit out of me, or would she freak out for a second, realize what was happening, then...go along with it and we'd never speak of it again.
I'd always tell myself "You're a fucking weirdo for thinking that" and I never did it of course.