Thanks to an American lad in Ireland, I came across this picture of Rory Lamont, younger brother of Sean, about to plant one on his teammate, John Barclay. Both play for the Glasgow Warriors of the Rugby League.
I love you, Big Guy!
And here's David Williams, KOTH, planting one on his teammate, Anthony Watmough:

Not only do Ruggers get naked, they kiss each other, too!