Try all different things, positions, moves, teasing him, using sex toys, talk dirty to him, etc.
One way we enjoy it is, lay him down on his back with his arms back above his head and tell him he can't touch you (I restrain his hands to the bedpost#, straddle over his chest #kneeling), play with your breasts and nipples, slowly work your way down to your genitals. Tease him by leaning forward occasionally for a few seconds so he can lick/suck your breasts, every now and then rub your wet fingers on his lips and have him lick/suck your juices off your fingers talking dirty to him, do the same with yourself, lick your wetness off of your fingers or use a sex toy for masturbation and lick/suck the toy ever once in a while. Either right before or right after I orgasm, I'll move up and straddle his face for him to give me oral.
Use your imagination and have fun with it. He can do the same for you too. ;o)
Love 
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