Staring at women's breasts can lengthen a man's life expectancy.

Staring a woman's "assets" is known amongst all men as causing good sensations, but a recent study claims that it actually improves your overall health.
The author of the study, Dr. Karen Weatherby, claims that "just 10 minutes of staring at the charms of a well-endowed female, is roughly equivalent to a 30-minute aerobics work-out!" Sexual excitement gets the blood pumping and improves overall circulation. She also states that, if done regularly, ogling can add up to 5 years to a man's life!
(source)