Does anyone else do this?

[Clairitek]

My mother said she used to stop me from counting everything when I was a little kid.

I still always count stairs, up and down. The average staircase in the US requires 13 steps to get down.

I used to count the steps it would take to get to school as well.

 

[elrohwen]

My friend adds up the numbers on her clock and I think the sum has to be even or something before she can relax and fall asleep.