The benefits of sex with an ex:
1. No chance of being shocked by what he looks like naked the first time. That horrible mole is right where you left it.
2. Not having to awkwardly ask for contact details after. If you don't have them, it's not by accident.
3. He knows where your buttons are, how many there are, how long they need to be pressed and whether they should go side-to-side, up-and-down or in little circles.
And the drawbacks:
1. There's probably a good reason you're not together anymore. A very good reason.
2. One of you will think this means the relationship is back on.
3. There is absolutely no way you can tell any of your friends without coming off as the world's biggest prat. After all, they had to live with you post-breakup, right?
Belle de Jour