If you start feeling odd or loopy, then that’s a good sign to stop, since you reached your limit!
By the time you start to feel “loopy,” you have already been drunk for quite some time. If you want to test this theory, go to a drinking party, but instead of drinking, just watch those around you, and from time to time, ask the obvious drunks how drunk they are.
Most of them will tell you “lightly buzzed” or “I’m still okay,” even if they are already wearing a lampshade, or doing other silly things that they normally wouldn’t do while sober. Very few people are self-aware enough to realize when they are drunk.
A rule of thumb would be, if you’ve had two or more drinks, don’t try to drive home (or log on to CAF), even if you “feel fine” and also don’t drink at all when you have responsibilities - work, kids, etc.
We had a very sad incident last year in which a father lost his children in a snow storm when he was drinking at home. He realized that he was too drunk to take care of them, so he took it into his head to take his children out into a blizzard in nothing but their pyjamas, to take them over to his sister’s place.
The children wandered off to look for warm shelter and became lost, but he was so drunk that he didn’t realize they weren’t with him any more. He was picked up by the police for being drunk in a public place, and it wasn’t until the next morning that he asked where his kids were - and that was the first that anyone knew he had taken the kids out with him.
They had frozen to death, of course.
The father simply did not realize how drunk he had become, or how impaired his judgement was - he knew he was “loopy”, but it didn’t occur to him to think that he might be making really bad decisions.
The only smart thing he could have done, was to remain complete sober for as long as he was responsible for the kids - because you can’t think straight when you’ve been drinking - and you also can’t necessarily tell that you aren’t thinking straight.