Originally Posted by vashti
Well, think about it. You have sex with the same person regularly, so you lose all your inhibitions (I guess this is more a problem for women, for whom what is going on inside their heads is at least as important as what is going on with their bodies). You also get to know exactly what your partner likes or dislikes, so (for the man) he gets to feel like an "expert". It's a bit of a boost to ones self-esteem, I guess, to know that you can please your partner when someone else would have to learn how to do it.