Contrary to popular belief, it seems that what men want from sex is intimacy and closeness:

http://au.news.yahoo.com/a/-/latest/5204908/men-want-intimacy-closeness-study/

So forget the bedroom gymnastics, and work on the things that help to foster those feelings during sex and its aftermath. Find out what makes your partner feel loved and needed, what helps to bring the two of you closer together. You don't need to be some sort of porn star to keep a partner satisfied, as long as whatever you do together meets the emotional needs that your both have.