Most Helpful Guy
Well, perhaps beauty is one of his standards but he is interested in other things besides just her appearance.
Also, perhaps to him these women are extremely beautiful.
I know I can sometimes find a girl who is cute, maybe a little on the plain side in just a pony tail and glasses more attractive than a woman all decked out to go to the club.
Maybe these woman are really genuine, classy, smart, high character, sweet and really fun to be around.
Maybe he wants a woman who really wants him. Maybe some of the prettier women were the types to want to date around a lot and play the field and made him feel like he was always competing for her time and attention, as if he was always auditioning for the role of boyfriend against a bunch of other interested guys and he doesn't want to play that game.
Lots of possibilities.