I promise to no longer touch any ones keyboards at work if you all promise to keep your hands off mine.
After seeing a twitter post on this, I read an article at the Beeb on how; and I definitely quote:
Research by the University of Arizona last year found the average office desktop harboured 400 times more bacteria than the average office toilet seat.
…
“Should somebody have a cold in your office, or even have gastroenteritis, you’re very likely to pick it up from a keyboard.