Why aren't men "desirable"?

I mean think about it. Every half decent girl has 50 guys after her. Every single guy stops and looks at a good looking girl when she goes by. But what about men?

We don't get noticed unless we're really good looking, and even then, we have to have a ton of cash. And yet still some girls ignore us. What makes guys so undesirable?

Why are we the desperate ones who will take almost anything we can get?