A:Scientifically, the answer is the first effect of alcohol on the person drinking is to lower your normal inhibitions. That means you FEEL like doing things you wouldn't otherwise do in your right mind -- such as, further drinking beyond what you know is good for you; and possibly driving, which you know you should not attempt -- but your normal inhibitions are blitzed. That's why you wake up the next morning wondering where you slept and who with.