How about face down, butt up, legs spread, your balls dangling for a gentle (or not so gentle) grope. Do you like to fold your arms behind your back in total submission to the cock that's about to plug into your ass or do you like to control from the bottom?
Or maybe you like to lay back, draw your knees up on each side of your body, leaving your cock and balls exposed for the groping of your partner while his cock plunges deep into your ass.
Be as explicit as you want. We want to hear it all.