Women give up sex easily, so there is no reason to marry them. Besides, they get wrinkly and ugly when they get older. Younger girls will go for older guys, assuming said older guy is clean and fit. So as a male, you can be something like 45 and date girls in there 20's. Marriage would get in the way of that, and then later, you would have a woman who is just too old.
Man, do I love women's rights.
Man, do I love women's rights.