You know the popular guy who has a new girl every couple weeks? People usually feel sorry for the girl in the relationship because she gets tossed aside easily for someone new. But at the moment, I feel sorry for his best friend.
Guys seem to have this unwritten rule among themselves that they can't date their friend's ex. I think that that's a pretty neat rule, kind of a friendship-loyalty-thing, and girls would have a lot less angst among themselves if they had a similar rule.
Still, it can be more of a curse than a blessing to the friends of those who get around. All of the "date-worthy" girls would have already been dated by their friends, so they don't have even a glimmer of a chance.
The writer in me wants to make something of this. Now to find a plot :P