4) The reason all the guys who are saying girls are dumb are single is because girls are dumb, and we aren't willing to drop ourselves down to that leve.
But... girls aren't dumb. I have a girl and I've been elevated by it, not reduced. I have attained more, not stooped to less. If the only girls a guy can get are the sort that would lessen him, well, he's not an impressive catch to begin with!