A few weeks ago I posted a question related to sphere packing and kissing numbers. This led to a bit of humor from my son that I thought some of you might enjoy.
With typical 8 year-old bravado, my son occasionally asks me to pose "hard" questions for him to answer. As a more-or-less typical father, I decided to pose an unresolved mathematical problem. We had talked about circle and sphere packing a few weeks earlier so I smugly asked "What's the kissing number for spheres in the 4th dimension." With the timing of Jack Benny, he responded: "1-800-KISSING."
Much better than the right answer. You can imagine my relief that he didn't start is with "1-900."
For those who may have not followed this thread, the kissing number for spheres in 4-D is known to be either 24 or 25 but it remains an open problem which one.