It can be, and is, frequently. But do not use it as a lube on natural rubber - it will "eat" it.
No, I wouldn't say so. The reason is that Water is not a lubricant at all. Thus, You must consider whatever you are going to use Lube for. you should consider the feelings of your partner or vehicle. Would you rather use Lube?
lube
Use some lube.
Eating food, and they use it to eat. :D
Use caliper lube
spit usually x
Not recommended.
use lube
Blood works well.
Use lube. Fact.
Use more lube.