A horse walks into a bar, bartender says to the horse, What's with the long face?

There was also a guy at the same bar who would come in and ask for three beers at once. So one day, the bartender finally asks him, why don't you order one beer at a time and enjoy them cold? The guy tells the bartender that he always used to drink with his two buddies but they are now fighting overseas. So he orders three beers as a tradition of them all drinking together. Then one day he came into the bar and orders only two beers. As he's enjoying his two beers, the bartender says to him, I'm sorry about your buddy.
The guy says, what do you mean? Well I figured that since you only ordered two beers, one of your buddies died at war.
The guy says, oh no, they are both fine, but I quit drinking!