Georgiansilver, please read my post again. The point of it was that there are physiological reasons why we don't actually know our limits.

h, my son was in the Navy, where they have Designated Walkers for party nights in port. He always said it was better to be a Des. Walker than a Des. Walkee. The way they handle it is that the Walkers carry a digital camera, and the Walkee is treated to a photo-essay on what a good time they had, once they sober up. These include the vomiting-on-self-in-the-shower shots, and everything else that happened. The pix are shared with the Walkee privately, and then if they take a turn as Walkee again too soon, their pix are offered to the group along with the first drink. The peer pressure helps some of them drink less, but these are hard-working sailors, not daily consumers/addicts.

~Susan