My husband and I are in our 20s and have been married for two years. While he has a larger sex drive than I do, it's never been a problem until recently. He has several pornographic DVDs that he frequently masturbates to, but when we do have sex, he can't perform.

He doesn't seem to think it's a problem that he can't maintain an erection with his wife, but has no trouble when he masturbates. I have tried to spice things up in the bedroom, but I can't bring myself to act like a porn star, which is what he seems to enjoy. How can we get our sex life back on track?