I’ve never taken a lesson, (I want to and desperately need to), but am afraid the pro will say this to me, ha.
More much detailed explanation about the joke below, if you are interested.
The joke uses the phrase “you can’t teach an old dog new tricks” and takes it literally by making the golfer an actual dog. Instead of talking about habits, it turns the saying into a reason the golf pro refuses to give lessons.
It plays on a common feeling among longtime golfers: wanting to improve but suspecting their swing is already set in stone. The humor comes from mixing a familiar saying with a golf lesson setting.