Sex Factor (seks-faktur): When you can't make it past the first 3 minutes of a scene because you've blown your wad during the striptease, that's the sex factor. It's the magical feeling you get when no one is home and you got the place to yourself just to rub one out. It's what makes a scene your favorite scene - the kind you watch over and over and jerk off until you arm's drenched in gallons of goo. Some flicks got it, and then there's the rest. Get ready to experience the sex factor!