Blind dates who are much older than they claim online, drunk surgeons, O.J. Simpson.

Not everyone deserves a second chance.

Sex and exercise, on the other hand, are definitely worthy of a round two. You already know that exercise makes you look and feel better. But did you know that exercise, quite literally, makes you want to have sex? After a good workout (not limited to the gym, think hike, bike and climbing too), men and women alike experience a spike of testosterone (the famed "pump" of bodybuilding), the hormone that influences sexual arousal. And, yes, exercising improves blood flow to the genitals and reduces stress; a cycle which can lead to more sex.

And, it seems that having more sex (which means at least twice a week), is better for you than previously thought. Sex can do wonders for everyone both physically and psychologically. You will gradually notice that the more sex you have, the more bounce you will have in each step (and the more sex you will want) -- so if you're not quite interested in sex, I suggest exercising to jumpstart your libido.

How's that for motivation?