What if there were no sex, did ya ever think of that?
1 week later
Total caos. Couples get divorced. Condom makers go bankrupt. Nerds resume their regular life.
2 weeks later
People find other activities to do besides sex. Like checkers. Or wrestling.
1 month later
The meaning of love is discovered. Gorgeous men start dating ugly girls, hot chicks start dating obese geeks.
3 months lates
David Letterman quits his job.
9 months later
No moar babies.
10 years later
No moar AIDS.
120 years later
The last man and the last woman on Earth are abducted by aliens and taken to Mars. They have many babies there. Also, there's a Fountain of Youth right next to Olympus Mons. Funny, huh?