When I was a little boy I threw a piece of trash out of our car, my mom said to me "what if everyone did that"? I knew right there what I did was wrong.
What if everyone in the world was homosexual?
Okay seriously, is there some contest happening that I don't know about? Because I'm hearing some of the stupidest arguments I've ever heard, and given how long this debate has been going on that's really saying something.