That works so excellently for the military. You’re technically able to be called back in at any time, but you’re also allowed to drink when you could reasonably expect to have that time off.
And the clincher; you’re not allowed to be drunk on duty, so they can’t even say “no worries, I’ll pick you up” without implicating whoever ordered you in
Interesting, I’ve read / heard that cats heal themselves through purring but even that was just a guess with the next leading theory being that they’ll purr when in pain to comfort themselves.