I'll try to understand your perspective, but it's also not fair to him if you're disgusted by this. Even if he did enjoy his time with the other people, it doesn't mean the sex he has with you isn't as good or that he doesn't find you attractive.
If you want him to take a more dominant role in the bedroom, tell him. Passive aggressive hints never seem to work, so the best way to deal with it is to confront him.
I would really talk to him about this, cause this isn't fair for either of you. If you really, really dislike the idea that he's been with other people, dump him and find someone who's morals align with yours because, like you said, it could plague the relationship.