Bobby, you're a bright guy... you have to ask??
It's because you won't share your beer, MAN!!!
Don't you know about always buying the first pitcher of beers and making sure everyone in the place knows you're buying it... from then on everyone else will take turns buying because after the first couple of beers everyone will be feeling so good they won't remember who's turn it is to buy, but they'll all remember you bought the first round when everyone was sober.
Do what you agreed to do and don't encroach on others or their property.
Liberty: Freedom from the control of others - Webster dictionary 1828
If you think you can do it or you think you can't... either way, you're right!
"The basic difference between an ordinary man and a warrior is that the warrior takes everything as a challenge while an ordinary man takes everything either as a blessing or a curse." excerpt from "Tales of Power"