Maybe he'd be in to the thrill of danger... Have sex outside... Maybe hike a mountain or skinny dip in a lake or ocean or spelunk... and seduce him. Don't tell him your plan before you start stripping.
Sometimes, it's not the "inventiveness" - it's just seemingly spontaneous or different. The hottest thing that happened to me recently wasn't unusual at all - just unexpected.
Another idea. Get yourself some ben wa balls and just start toning your vaginal muscles. After some progress, you may be able to send him through the roof with your control of his man thang. (grin) Knock him dead, sistah!