Source: Cosmopolitan
What They Say: "A guy's prostate - the walnut-size gland under his bladder - is the ultimate magic button to push if you want to blow his mind in bed. To tantalize it, partway through oral sex or intercourse, rest two fingers against the swath of skin between his testicles and anus."
What We Say: This will result in mental, and possibly physical anguish on his behalf. Avoid sneak attacks.