Sharpie
I take a sharpie and stick it in me, then I get on pillows, with at least my lower half naked, and I just go in a down-back-up motion. I go slow, fast, slow, fast etc., etc, etc.... Then I finally get 'the big O' but right before I do, I stop and I can only last like five times of doing that, before I can't stand it and do let myself go the full way!!! IT'S AWSOME AND WORKS GREAT FOR ME!!