One can only assume that when Old Tom Morris and Willie Park, Sr. engaged in some friendly trash talk back in the day, it was about how one got more distance with his brassie. Or how many tweed vests they owned.
Fast forward to 2014, and you have Twitter exchanges like the one Jordan Spieth and Rory McIlroy had before leaving for Denver on their respective private planes.
Eventually Rickie Fowler chimed in as well.
All in good fun, of course. If golfers wanted to strike a nerve with one another, they'd reference something really personal -- like, say, the size of their endorsement contracts.