For optimal dual pleasure, you should try

How it works: Lie on your back and bend one of your legs, keeping the other outstretched. Have her straddle the raised leg with a thigh on either side and then lower herself onto your member so that her back is facing you. From here, she should hold your knee and use it for support as she rocks up and down. "This position is great, because it's a lot like the reverse cowgirl, but with a twist," says Landa. Raising your knee allows her to rub against your thigh—which produces optimal clitoral stimulation, says Landa.