Sex: it's one of the most popular activities to do when naked. People just seem to like it. If the TV is any indication, everyone really wants to have sex all the time. According to top scientists, if we don't have sex, our entire civilization could collapse! So CBS gives you their top ten reasons to have sex tonight. Don't wait until tomorrow. Sex must be had tonight! After the jump, ten of the worst pick-up lines ever.

1. Sex Relieves Stress 2. Sex Boosts Immunity 3. Sex Burns Calories 4. Sex Improves Cardiovascular Health 5. Sex Boosts Self-Esteem 6. Sex Improves Intimacy 7. Sex Reduces Pain 8. Sex Reduces Prostate Cancer Risk 9. Sex Strengthens Pelvic Floor Muscles 10. Sex Helps You Sleep Better

You know, I wasn't planning on having sex tonight, but my Pelvic Floor Muscles are out of shape. Excuse me while I make some calls.

"Top 10 Reasons To Have Sex Tonight" [CBS News]