If she brings copious amounts of booze, green, or recreational medicines to your next roll in the hay, there’s probably a reason why she can't stand to be sober. Of course, there are exceptions to this rule—if she’s planned this night for a while, or she’s going out after, or she's a junkie. But if it’s a Tuesday, and she’s on your couch pre-gaming for the sex session, you likely took a few wrong turns the last time.