Imagine, for a moment, that it’s a chilly December night, and a pretty young brunette has come to your apartment. Your courtship of her began when you were picking up a paycheck and told her you had all that money but nobody to spend it on. She accepted when you asked her out for dinner. After that, the two of you spent time together—hiking, cooking, talking. On this particular night, you share a joint. When she leaves your apartment around midnight, you give her some pot for the road. A similar handoff occurs a month later.