Most Helpful Guy
it could be convenient. I can't speak for every guy, but my minimum for having sex is a 5 (neutral) on looks and 7 on personality and for a relationship is 7 on looks, 9 on personality. I have dated a 10, and I am such a tough grader that I've only met 5 of them in my entire life.
It could also be that he was the rebound for the prettier girl and she broke up with him for a better guy. Maybe he doesn't want that to happen again, so picking a slightly unattractive girl may be his solution.
Most Helpful Girl
Sometimes its not about the looks. She could have a pretty bomb personality but there is also a chance she is just a rebound.