Morbid Humor and Water

Okay, you're clearly someone who likes to make jokes but can't understand them, just like how you are able to make a mess but never clean it up, so listen closely! The joke is using an analogy to compare morbid humor to water. It suggests that just like some people don't like water, or can't tolerate it, not everyone will understand or enjoy morbid humor. It relies on the double meaning of the phrase 'gets it', referring both to the act of receiving a physical substance and also understanding a concept.