Not everyone feels the need to masturbate. You may become very aroused when you’re with your boyfriend and want to have sex, and then not feel aroused at all when you’re apart, and there’s nothing wrong with that. Other people feel sexually frustrated when they don’t have a partner and so masturbate to relieve that sexual tension, but if you don’t have the need to do so, then don’t worry about it.

As to your second question, my answer is again, don’t worry about it. The important thing is that you can climax. Most women can’t climax in the missionary position. There are many women who also can’t climax from oral sex. It’s not something to be concerned about. Now if you’d like to experiment with other positions to see if there are other ways in which you could have an orgasm, then get a book like More Joy of Sex and try the various positions. If some work, great, if none do and you always have to go back to the female superior position, then that’s OK too. Many women require a certain method in order to have an orgasm and they can’t deviate from it. If that applies to you, the important thing is that you can have orgasms. And if you’re worried about boredom setting in, my advice is to find other ways of making your sex life and your life in general less boring. The brain is the most important sex organ and as long as you find other ways of stimulating your brain, you don’t have to worry about using only one position to have an orgasm.