The bronze statues by the city gates show their right hands worn thin by the touch of travelers who have greeted them in passing.
~ Lucretius, De Rerum Natura
I leaned recently that forensic DNA analysis has advanced far enough for viable samples to be recovered by swabbing the wall, table or door where a hand had only briefly settled. Science appears determined to make us all into lepers. Now, whenever I shake someone’s hand I’ll know that I’ve given a little of myself away.