Binge, thanks for your link.
Again, the million dollar question here is: Does he just outgrow this, or does it become more frequent?
DWI: I do not know if he drinks & drives. I will find out. He may be risk-averse enough to know to take taxis. I know many alcoholics who "know thyself", and never EVER drink and drive. Self-survival. In fact, one intentionally avoided owning a car entirely, for YEARS, perhaps to avoid a DWI. Interestingly, his drinking did progress in his 30s. He now gets drunk at home, when he's got no seasonal work. But when there's work, he stops drinking, and works like crazy, 7 days a week.