I have no idea how this works, it just does.
It's something to do with the friction created by the rubbing
I came up with it at about 3am about a while back.
Thought I'd share it with you lovely people.
Can be done in short sleeves, naked, surrounded......no issue as there's nothing to hide.
Hope you like my li'l contribution.
Those I've shown around here seem to like it!
Loose Change
