This goes beyond what most guys are willing to do but you can get vibrators (cock ring style and prostate style) that make the vibration sensation travel up your penis. You get the woman to do cowgirl and really grind on you, the vibration hits the clitoris and the G spot. Before you can even start to worry about cumming too soon, she's going off like Old Faithful. I've had several women squirt from this, a couple who'd never done it before. It might be a bit much to try if you've never really used toys in the bedroom.