I should add that I wasn’t exactly a fan either. Certainly not a practitioner - my own family jewels are far too precious! But I have seen all sorts of testicular japes in the past amongst Armed Forces personnel. Some on things like TLP and other exercises with other nations too. Some involving Bootnecks with no clothes on.
Maybe you just led a quiet life as a trucky back at your hotel
It’s even in the Urban Dictionary:
https://www.urbandictionary.com/defi...ball%20walking