Well, they are women. They have been practicing all their life to do it. They are all about increasing their desirability quotient. They achieve a upgrade by rejecting with no risk. If you are not a CHAD you are walking around with a sign that only chicks can see that says "KICK ME IN THE BALLS for an upgrade." At least you are no so bad that they would get a downgrade on desirability even by rejecting you. Think toothless homeless guy.