You’ve been around the block once or twice, and no, we’re not talking alternate side of the street parking. We’re talking sex. You’ve done your homework, boned up on the finer points of doing the deed, and when it comes to getting busy between the sheets—or whatever your locale of choice—you can be trusted to bring it on, bring it home and just...bring it. You’re the man. The love guru. A sexual rock star. But you know what? You might be mistaken. While you may be certain your performance is hitting all the right notes, in reality, your off-key love song can potentially get you sacked in the sack. (But always remember: all women were not created equal, especially on the playing field of sexual yeas and nays. One girl's thrill is another’s What are you doing?, but cut these deal breakers from your curriculum, and you're off to a good start.)