When you're on junk, you have only one worry: scoring.
And when you're off it, you're suddenly obliged to worry about all sorts of other shite. Got no money, can't get drunk. Got money, drinkin' too much. Can't get a girl, no chance of a ride. Got a girl, too much hassle. You have to worry about bills, about food... about some football team that never fucking wins. About human relationships and all the things that really don't matter...