Now, everyone here has really good advice, and it's all probably based on more experience than I could imagine. I don't claim to be in any position to give out advice, but the one thing that comes to my mind is this, and it goes for anyone who is having the same problem. You can twist and suck and blow and jerk until the cows come home (and won't those cows be surprised what you're up to when they do), but make sure the gentleman's completely comfotable. In my limited experience, if a guy is nervous about anything, the show does not get to the finale. That's just my little chunk of advice.