Smoking weed can heighten your sexual desire and lower your normal inhibitions. But, if you have looked at stuff like this while not stoned and it still turned you on, then it may just be a fantasy that you have.

You don't have to be attracted to a male in order to fantasize about that sort of activity with one...

It sounds like you were dominated when you were younger and unconsciously it turned you on or pleasured you in some manner and it's manifesting now into adulthood.

A lot of people like to be dominated in a relationship or in a sexual situation so unless you act on it recklessly, it's nothing to worry about but possibly something to explore when you're in a committed relationship later.

Hugs,
Storm