That reminds me.
In Myrtle Beach my mother's husband said that we're really floor 19 since there was no floor 13. The floor we were on was labled the 18th floor.
So I said, "No, we would are technically floor 17, this is because floor 14 is really 13, 15 is 14, 16 is 15, and so on."
Then he and my step sister started laughing calling me stupid. My mom and I just look at each other with the face expressing "Can people really be this stupid?"
That is my entire basis for my thought that stupidity is genetic. >:3