Why? Slow, alternating left–right touch paired with self-holding is used as a self-soothing practice to settle distress.
Cross your arms over your chest so each hand rests on the opposite shoulder. You can follow the rhythm on screen, or tap along yourself with the buttons below. Turn on Voice guidance so you can keep your eyes soft instead of reading the screen. Vibration is optional — the practice works fine without it.
About 1½ minutes — 3 short rounds with rests.