Answers (2)
In my personal opinion, I think it's because they don't understand the value of liking someone. It's just a joke to them. Most girls when they're little watch princesses, where there are happy endings, and through life, they're more observant over relationships. But guys, they think it's an ability they have, that girls are expendable and as long as he's got his looks, he won't have to worry about not having a girl friend. And in a harsh way, that's true.
You're a compulsive liar you know that?