My 2 cents about women who love... and Tre's friend
I think 99% of the time it's sexual - from the woman's point of view not just the man's.
I think it's the same reason certain people get addicted to certain drugs... the 'high' (in this case the sex and supposedly intimacy) is so good that those women (try to) put up with all the rest, while dreaming, yearning for more. These men aren't necessarily better lovers or superstuds, it's about how it makes that particular woman feel. It's almsot an exponential curve... the lower a woman's self-worth, the higher the high she gets from the man.
Sure those women might want that sexual high to transform into something more loving and long term, but they're fooling themselves because it's unlikely that's gonna happen. It was a man who invented the phrase: if the cow gives milk for free whenever you want, why buy the cow?