Ex Sex

This one is simple: just don't.

You broke up with your boyfriend of two years; several months have passed, and you aren't seeing anyone new. You're lonely. Your ex is horny. Hell, maybe you're horny and he's lonely. Or a combination. You hook up.

MISTAKE! It's easier for men to have casual sex than it is for women. If you surrender to his embrace, you risk bringing all those feelings rushing back, accompanied by the hope of getting back together. Think: the relationship ended for a reason. Whatever that reason was, it won't be fixed by post-break-up sex. Then you're left confused and flooded with lingering feelings.

If you break up with a significant other and keep them around as a "friend with benefits", you aren't making a clean break. Plus, sex stirs up all kinds of feel-good chemicals in your brain: lying in his arms, soaking up the post-orgasmic bliss, you may feel like you're in love with him again. You aren't.

Here's something else to consider: you may fall into a destructive pattern of having casual sex with your ex, which can interfere with new relationships. I know a guy who kept his ex on the back burner for years, just to get sex when he couldn't find it elsewhere. Not only was she kept hanging, but it was harder for him to move forward with a new girl.

It's better to:

Please yourself. Go get a good vibrator and turn up the heat.
Find an alternative. This might be a good time for a shopping trip with the girls.
Get back out there. There are plenty of fish in the sea. Go fishing.