It's entirely possible (and believable) that the father does both.
Heard a similar joke once involving a boilermaker and a welder.
A horse walks into a bar.
Bartender says, "Why the long face?"
################
Knock, Knock.
Who's there?
Control Freak. Now you say, "Control Freak who?"
Ever hear the Suspense Joke?
When Clinton was President, one day Hillary got bored and she and one of her NOW gal pals went for a drive without the Secret Service (having craftily eluded them). Hillary was driving and all of a sudden the car just stopped and nothing she did would get it started. So, they walked a few miles to a gas station which just happened to be a repair shop as well. When Hillary walked in the door, the mechanic gasped, "Hillary?! Is that you?!" Hillary recognised the mechanic as an old boyfriend she had been engaged to and almost married. So, they had an old home week reunion, the car was later picked up, brought to the shop and repaired. Hillary and friend were back on the road in short order, and the friend said, "Gee Hillary, just think, you could have been married to that mechanic instead of The President of the United States." Hillary replied, "Dear, if I had been married to that mechanic, HE would be the President of the United States and Bill would have most likely been the mechanic fixing our car this afternoon."