Guys marry charm. They marry a sweet smile, a perky toss of the chin. They marry clear skin and bright eyes, soft lips, warm hands. They marry curves in a pretty print dress and silken hair that smells like warm milk and new-mown grass. Men marry necking on back roads with crickets creaking in the woods and warm breezes and Sally is just so unspeakably wonderful they can't do without her.
Men marry illusion.
Sally marries a pre-med. We males have an infinite capacity for deluding ourselves. The charm of women doesn't last, any more than flowers in a mountain meadow. A requirement for a marriage license should be that the guy spend fifteen minutes thinking of Sally as twenty pounds heavier with crow's feet and PMS and no further incentive to control it. In five years she won't want to party.