i just started using this girl-on-top position that makes my man come SUPER fast! I'm talking under a minute here (and he usually can last for a long time...average, 20 mins). I crouch on top of him, balancing on my feet like a frog hop thing, and then bounce up and down. The key is to bounce up far enough that his penis almost pops out, but not quite. If that doesn't make him come faster, i dont know what else will!!! (other than him masturbating to the point of ejaculation b4 having sex)