nudity in movies

I really don't understand why I get so mad when my boyfriend tells me about the movies he's seen.. especially scary movies that humiliate women.. I know it's just a movie and he would have watched it with or without those scenes.. I just get so mad. I'm not sure if it's my confidence or jealousy.. I used to not care and now I get so mad when I think about all these naked woman and nasty scenes. I don't tell him I get upset because I know it's crazy.. please tell me what you think could be going on and how to avoid getting so upset about it.. does anyone else feel this way?