Q. I love going down on my girlfriend and she says she enjoys it too but after a few minutes she always stops me. I really want to be able to make her cum with my tongue because it really turns me on - why won't she let me?

A. It could be that your technique is OK but not quite what she needs to orgasm. She might be lying to you about enjoying it, or she might not believe that you really want to be 'down there'. I get mail from women who don't enjoy oral sex because they feel they have to cum quickly before their men get bored - or get cramp. You have to convince her that you love it. Take the pressure off by trying the 69 position - she'll be too busy to let her thinking get in the way of her enjoyment, and yours.