One way to make this sweet, lingering sort of foreplay a little bit more sexually explicit, he says, is to develop a sexual signal. Whenever she touches her ear in public, say, or yawns, or runs her finger along her throat, that means: "I can't wait to get you home in bed." Or, if you've got a slightly oddball sense of humor, you can give his penis a name. Call it "your friend," let's say.

She calls him at work and says, "1 sure will be glad to see you and your friend when you get home." Or, "Do you think your friend will still remember me when he sees me?" Or, "Why don't you introduce me to your friend when you get home?"

Says Dr.: "Women are usually very sensitive to a man's sexual cycle; they usually know when he's going to want to make love that night. Using these little signals can help enhance this sense of sexual anticipation tremendously."