13 Things Every Woman Doesn't Know About Her Own Body

In photos, we tend to look younger than men.

Bad news first: Because of hormonal changes, women lose collagen in the skin much faster than men. But take heart—regardless of how rapidly women’s skin ages, men still tend to look older, says Patricia Barnes-Svarney, the author of Why Do Women Crave More Sex in the Summer? This is because men's skin is thicker and more likely to show facial lines and age spots and also because they subject it to the often-daily trauma of shaving as well as chemical baths of aftershave and astringent. On top of that, men have their own epidermal challenges to contend with: Testosterone can make their complexions look slick and oily.