Why Waste Alcohol?

I was watching this movie 'College' last week. It might have been one of those gems that have gone straight to DVD. The title got me and I made it about half way through but had to turn it off. What I noticed is that recently in movies during party sequences in order to show that people are having a good time they don't drink the Booze they throw it around the party. What's up with that? I don't remember shaking up a beer can and opening it and spraying it around as a fun time. I remember drinking the beer can, or throwing a full beer  can (at somebody) but it offends me that in order to show that people are having a good time they have to spray all the booze around at each other. It's such a waste. Drink it, pee in a cup and then throw the pee around. Isn't that more fun.