I've just finished reading a story about a surgeon who marked his initials on the livers of two transplant patients. Where is the strangest place you've ever etched your initials?
I used to bite an M into wooden bars in West London in 2002-2003 There are several here. https://www.google.co.uk/search?q=t...%2C%2033%20Moscow%20Rd%2C%20London%20W2%204AH
Used to bite the pew in chapel when i was wee. Ye still see lots of bite marks on them but they’ve been varnished over about 100 times.