Grandma Snapp played the piano most of her life. My Grandfather was a preacher. Grandma played the piano. My mother, their only daughter for 21 years, was made to lead the hymns standing on a soapbox.
In her last years Grandma Snapp drummed her fingers on the table. That made my mother crazy! I always imagined she was perhaps playing part of a piano piece?
When I turned 65, I found myself unconsciously drumming a rhythm with my fingers. When I realized what I was doing I wondered, do I do it because Grandma did? Is it hereditary? I am not a pianist. The rhythm seems comforting.
iPhone will let you set your vibration signal. I have mine set for incoming calls. Guess how I set mine? Yep, same rhythm! Find it under ringtone, custom vibration.