Try it in the shower: soap him up really well, sit underneath him (he's standing), put your left hand on top at kind of a 90 degree angle to his penis and your right hand parallel on the bottom (directions are for righties). It's kind of like the position some people use when they clap their hands, but for the love of god, don't clap your hands! Does this make sense? Try to keep your hands kind of flat. It sounds weird, but my guy loves it. Especially as a primer for the evening... lather, rinse, repeat (with your mouth). And if you don't like the hand-thing, you're in a great position already for, well, you know.