Hardcore, desperate alcoholics will do whatever it takes to get alcohol in their bloodstream, even if that means drinking mouthwash. Perhaps some of them even acquire a taste for its minty flavor, and Dr. McGillicuddy's was created with this niche in mind. I cannot easily think of any other reason for the existence of a liquor that tastes exactly like mouthwash, so there you have it.

I once spent an entire evening at a nightclub drinking Dr. McGillicuddy's exclusively, for the sole purpose of frightening and upsetting my friends. Knowing me to be a man of refined tastes and flawless decorum, they could not help but wonder at my sudden devotion to a drink generally favored by gutter drunks, the clueless (usually as part of a cocktail), or those who forgot to brush their teeth before going out to the bar. Even if your breath smells exactly like that basket of onion rings you just ordered and then wolfed down, you can still hope to rectify the potentially-meeting-someone situation with a blast of minty freshness from the good Doctor.

Of course, that explanation might hold if you only drink one Dr. McGillicuddy's, but not if you order a second one and then a third and then a fourth. By the end of the evening, I could cure other people of bad breath just by talking to them, or even just breathing on them as they walked by. I personally found all of this to be pretty hilarious, but my friends were barely talking to me. So I made sure to breathe on them even more!