I like puns and wordplay, especially really bad puns and dumb jokes. I make these all the time and enjoy them a lot more than the people around me, I think
usually I'm cracking up hysterically over my horrible pun and they're groaning. I laugh a lot more at certain jokes than most people around me, and often at the wrong time (like several minutes later I think of it again and start cracking up). And I don't laugh at all if I don't think a joke is funny, unless I'm on the lookout for it and try to fake a reaction (I usually don't bother). Eventually people usually start laughing at my dumb jokes becuase I'm laughing. People who know me usually think I'm really funny and those who don't think I'm extremely serious. I also like wry/sarcastic humor and deadpan. I frequently try to joke like this, and I have realized over time that some people don't realize I am joking and just think I'm off my rocker.
I am really bad at telling classic jokes... probably the worst person I know at it. My brother and I used to compete amongst ourselves to come up with the worst jokes in the world and then laugh ourselves silly. Sometimes I can go all day on a bad pun I thought of which I think is hysterical and those around me think is mildly amusing or not at all... this tends to either amuse or annoy people. The first time I heard the joke about the frogs in the bathtub, I kept laughing intermittantly throughout the day, and saying the punchline when people asked me for things and then cracking up.
For those of you who don't know it, it goes like this:
Two frogs are sitting in a bathtub. The first frog says to the second frog, "Please pass the soap." The second frog goes, "What do I look like, a typewriter!?"
If you are thinking that's the stupidest joke you've ever heard in your life, you can be glad you weren't around me that day
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I also maintain that most people find other people getting injured to be a basic form of humor, so I have employed this for cheering people up when they are in a bad mood: I explain the premise and punch myself in the face. Never fails...