Recently I just got a joke I made a couple years ago.
I was a teaching assistant for one of my favorite classes. It was a fun bunch of people and we all got along really well. I started talking something about advertising and children and mentioned what I found in a Happy Meal. One of my students said, Husayn, you bought a Happy Meal? Well, I was happy!, I replied. At which point the whole class laughed.
I think I didn't get it because it was the honest answer, although some part of me thought it was kind of a funny/silly answer but didn't really know why. I went home and told Suzanne what happened and she laughed, but she couldn't explain why it was funny. So that stuck with me, maybe 3 years later, till a week or two ago. For some reason it came to mind and I just started cracking up with myself. Suzanne asked why I was laughing and when I explained she found it a little hard to believe that I was laughing about this years-old joke, but there you go.