yeh except if you have drank properly (like 15 pints) you run the risk of passing out and wetting your pants. it happened to me at uni. In the morning I woke up and puked all over myself as I literally had no time to move. It was projectile... I was sat in a pee/vomit soaked mess whilst also suffering the worst hangover of my life.
My best mate had a similar instant the other week when he went out and had 3 bottles of wine, went home and got in to bed with the wife and past out. Later he woke to his wife beating him as he pee'd all over her

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I couldn't stop lol'ing.