"Fine with me." It wasn't, actually - he felt like he was playing some game for babies, with the milk and everything - but beating this guy at some ridiculous game was still better than nothing.
The game started off pretty slow. Both players managed to avoid blinking for quite some time. However, it was only a matter of minutes before Alex's eyes started to burn and water from being open so long. He couldn't resist his reflexes, and he shut them.
"Oh, got ya! Drink up!"
Alex took a swig straight from the jug, then went back to staring at the man. Within a couple more minutes, he felt his eyes demanding to be shut yet again. Yielding, he took another drink. This went on for nearly a quarter of an hour, the stranger somehow resisting the need to blink even once, before Alex started to notice a bit of pressure in his gut. It was almost like he had gas or something. Rubbing it, he felt as though it was a little bloated, but it was probably just all the milk . Back to the game.
Time continued to pass, and the man continued to somehow avoid blinking at all. Alex, on the other hand, wasn't doing so well. The pressure in his gut had begun to distract him, and already he was blinking more and more often as he found himself less and less able to concentrate on the game. After a while, he stopped feeling bloated around the gut and started feeling downright heavy, but he kept going. Eventually, the pressure became too great for him to ignore, and he reached down to clutch the source of his pain, only to find a surprisingly large... something hanging from him. Looking down to investigate further, he saw a large lump of flesh hanging below his waste, four short tube-like appendages coming off the end. It didn't take much thought for him to realize what this was, and in his disbelief he (unsurprisingly) blinked.
"Oh. looks like another drink for you," the man said in a bemused tone, apparently unphased by the fact that his competitor had just spontaneously grown an udder. Alex wasn't so calm about the situation.
"WHAT THE HELL IS THIS?!?"
"Hey, all that milk's gotta go somewhere, doesn't it?"
"What?!? You did this! Make it stop!!!"
"It'll stop when you stop drinking the milk. Oh, but I guess I wasn't clear on the rules there before, was I? Sorry, my bad. Let me explain. Every time you drink while we're playing, that little milk sack will get a little bigger and a little fuller. It's probably already feeling pretty tight, hmm? Anyways, if you win I'll take that milk bag off your hands, but if you stop drinking I think I'll just leave you with it.
"But hey, I'm feeling generous today. I didn't explain the rules clearly before we started, so I guess I could make an exception for you. How about this: if you can keep drinking until I blink once, you win. What do you say, kid?"