::: Indirect anecdotes without evidence of effect doesn't change the facts.  Let's check what Equipped.com (a survivalist site) has to say: "Never drink blood or urine. They will only hasten dehydration.".  What about simplesurvival.net?  "Finally, a few things you should not do. Do not drink urine. It is a waste product of a body and is just that, waste (think about that for a second…when a body passes urine, it is not longer need or useful). Drinking urine can even make you sick.".  Adventure Sports Online's 5 basic survival tips?  "Never drink urine.".  USGI Canteen Group?  "Also, don't drink urine or sea water. Some folks say that it's saved their lives, but there is no evidence to back this up. Both contain high levels of toxins that cannot be filtered out except by distillation or reverse osmosis.".  Wilderness-Survival.net?  "Do not drink urine." (very prominent, in the "Remember!" section).  Want me to keep on going? 

 ::: It's not medically sound, either.  Sure, it's sterile, but it's also saline.  Do you understand the concept of osmosis?  We're not saltwater-adapted; we cannot survive on saline fluids.  They dehydrate us.  Even if they don't make you vomit. 

 ::: Don't do it.  It's dumb, and it's bad advice.  Just like about half of Bear's advice.