My boyfriend has a problem with sex, I know him very well and I know he's not just being a guy. He likes to play around a lot but he's very iffy about me touching him I don't know how to help this or what to do... he did have a really terrible experience when he was younger but he's had long term relationships and he has slept with other women but only 2. He wants to have sex we've tried it once but he got too nervous about it and pulled away I don't know how to handle this situation?