Being Drunk?

I have never done anything stupid while being drunk. I have never drank. I have however seen someone on the verge of being drunk. He was starting to lose control and doing things he usually wouldn't do. It was as if he had no clue what he was saying and doing. It made me feel very uncomfortable. I really don't know why people, especially kids our age would waste their time drinking. I guess they think it's cool but it really just leads to trouble.