But, what about him? Are there any sexual clues that might give you some insight into how he really feels about you? Or to put it another way, after sex is he a “cuddler,” a “rollover-er” or an “up-and-outer?”

If he’s a cuddler, you probably have nothing to worry about. Even if he doesn’t fully know it, lust is doing its thing and pushing him towards infatuation and romantic love.

If, on the other hand, he does the “rollover” after sex and starts snoring, don’t be alarmed. He might still be a keeper. Men and women experience sexual response in different ways. As an example, men have to develop the requisite sexual tension to accomplish ejaculation, also known as the propulsive orgasm. It takes a whole lot of blood going into the genitals to accomplish this, as well as a whole lot of blood going out. It’s exhausting, to say the least. Post-ejaculation, men’s bodies grind to a halt. Since women have no need to ejaculate, blood circulates longer in the genitals—it’s slower going in and slower going out—so women remain in the aroused state: Hence the female capacity for multiple orgasms. So if he rolls over and starts snoring, cut him some slack. Sure he could use a little retraining—why can’t he fall asleep while holding you in his arms—but his heart may be in the right place.

It’s the “up-and-outer” that worries me. The guy who, right after sex, is up checking his messages, organizing his CDs or talking about all the work he has to do and the busy morning ahead. Just as women experience post-orgasmic regret, men experience pre-orgasmic anticipation. Men will say all sorts of things and get themselves into all sorts of situations and lower their standards in ways that women cannot fathom just to have sex, so powerful is the desire for orgasm (and why the aging toothless prostitute is still able to turn a tidy profit).