Symming

The obsessive compulsive practice of making the sequence, pressure, and/or intensity of sensations match on both sides of the body, rubbing toes together or making every footstep have a symmetrical amount of pressure for example. This behavior is shared by both people who suffer from OCD and autism, the term for which has been coined by u/GoatsWithWigs after reaching out to r/autism with a comic depicting symming via toe flicking. Not to be confused with stimming.

Person A: Why are you tapping your feet on the ground?

Person B: Sorry, I was just symming. One foot tapped hard on the ground, so I had to tap my other foot just as hard to make my feet feel symmetrical