Because sports are repetitive, pointless (unless you are a gambling man) and boring.
your not the only one , i'm not into sports that much either accept wrestling
which variety are we talking about? American, Canadian, Australian, Gaelic...or what the rest of the world calls football ie...soccer
The same reason that when you say "Love story" He starts snoring!! ;-)
Can you teach that trick to my wife? Then there'd be no disagreement about what we're going to watch.