OK, three posts showed up and 2 of them were about this topic, but I'm posting anyway...
There's a good bit of truth to what boomslang is saying, but there's also the fact that you're not completely you when you're very drunk. Remember, vino is wine, and bourbon, tequila, and anything else distilled is a hell of a lot stronger, getting you much more drunk than wine could in a much shorter amount of time. Alcohol is a nervous system depressant, literally slowing nerve signals to a crawl and killing some pathways off for good (hence the memory loss).
When you're that impaired, parts of your personality are completely shut off. We're not just talking inhibitions, we're talking rational thought processes, emotional reactions, all sorts of things that stop functioning correctly or even completely. The things you think at this level of inebriation are not your normal thoughts. This is why so many bad decisions are made drunk, and I'm not just talking tattoos. People die from decisions made drunk.
Now, tipsy, buzzed, happy, whatever you call it when you're a little drunk (like after a few glasses of wine), there you'll find more truth. You're still basically yourself, just with slower reactions, and slower thought processes. Things aren't shutting down, but the thoughts and emotions that keep some things in check are slowed, and you'll say and do things you normally wouldn't, but that have been in the back of your conscious mind. You may even gain some access to the subconscious, but that's the slower thought process talking - your mind finally slows to the speed of your mouth, and you can really say what you're thinking while you think it. Before the checks and balances kick in. It's a weird feeling, too, because you know it's happening at the time.
Then you drink more, because you think it will enhance this more. And that's when stuff shuts down and trouble starts.
[/sermonette]. We now return you to your regularly scheduled idiocy.