You know if you make sex illegal, something bad will happen.
Condom companies will go out of buisiness, making many people lose their jobs. And Even if you make it illegal, people are still going to have it, but will not have acess to condoms, because those companies are out of business, which causes very many people to get AIDS, HIV, and other sexually transmitted dieseses.
Since people wouldn't have condoms, lots of babies would be born, which means that this will not stop overpopulation.
There, a good arguement.