S&M can be completely normal and healthy. You should not feel weird about it. Perceptions of control/lack of control, giving/receiving pain, etc... all comes down to your own personal empowerment. Even if you are acting out fantasies where you seem to have no control, tied-up, etc., you still are. Your partner is engaging in this activity with you. They are doing what YOU want them to do. Many people who like to be dominated like it because it gives them a sense of empowerment that they don't get from more traditional sexual experiences.

The caveat here, though, is that all of these things should be completely consensual. If both partners are down for it and ready to go, then what's the problem! You aren't strange .

Also, "rape" fantasies are quite common. Its not about rape, its about control. There is nothing wrong with exploring these ideas with a consensual partner; however, don't put yourself into any risky situations.