My wife doesn't like vary many positions. We do missionary and she gets on top. Everyonce in a while, she lets me do doggie, but she says that it hurts her and doesn't feel very good. We have also tried (don't know the name) where she lays flat on her stomach and lifts her butt and I'm in from behind. She said that hurt too. Am I doing something wrong? I would like to try different positions. Help please.