Getting Your Sexy Back

3. Heidi's Law, Part Zwei. Klum may have spectacular genes on her side, but notice she doesn't exactly let herself go during pregnancy. Eating for two is a total fallacy — the little buggers require a surprisingly parsimonious calorie intake (like, 300 calories extra a day, at their neediest). And studies show that the main risk for long-term pregnancy weight retention is gaining too much (more than 25 to 35 pounds). Large gains also put you at risk for medical complications, saggier skin, and cooking up an oversize baby (and oversize babies can lead to C-sections or trickier vaginal births, which are more likely to leave lasting damage and scars).

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But male sexual partners don't seem to notice a difference, or, if they do, they don't care.