Yeah, I'd have to say hand on clit that is not immediately followed by hand on clit being pushed away is a question already answered.
How about "shuddap and f*ck (or other appropriate euphemism) me yah big man"? Emphasis on man to hopefully clue him in that there is nothing remotely childish going on here. Followed up by some hip gyrations to let him know that hand on clit is welcome. If I didn't already have a clue, that would get me going. Of course that is JMHO and may be too "firm" for your H (although I cannot imagine why) or it may be too close to you initiating. Take it or leave it.
Chrome
"Recollect me darlin, raise me to your lips, two undernourished egos, four rotating hips"