I have an American mate who collects beer cans. Empty ones, opened from the bottom so you don't damage the ring-pull. He calls it ''can-ately', and goes to 'canventions' to trade with the like-minded.
I thought it was mad until he started sending me money to buy them, drink the beer and send him the empties!
I've no idea what his ex-wife thought of it!
Just to keep with the rugby theme, I took him and his son to K Rd a few years back. Standing under the the Scaff was quite an experience for them!