Really depends on what your guys into...
While giving him head, sneak a ice cube in your mouth and continue.
Try a handjob in different postions, ( behind him, sitting with your vag. touching his dick ect.)
Give him a rimjob
Dress up in naughty outfits
Have a 3some
If a 3somes out, talk and pretend as if you are having one, while giving him head, sex, ect
Have sex with a girl and just let him watch
Let him watch porn as you get him off
Let him see how you masterbate when he isn't around
Have him close his eyes and you describe a nasty fantisy of yours while you pleasur him
Are any of these what your looking for or am I retard?