Kale I can't stand but is supposed to be very good for you.Orson, you're right about the "hamburger", but supposedly it was because it came from the Hamburg region of Germany. At least that was the story I heard when I was young. It's just ground beef. Ham, of course, is from the hind quarter of the pig, either that shank or butt portion. Then you have Spam which is pork shoulder and ham ground pressed cooked, and canned.
The cartoon to which you refer is Popeye the Sailor. It has the character Wimpy who always promised to "Pay you Tuesday for a hamburger today". I think the show was a plot to make kids eat spinach, but I didn't fall for the ruse. I couldn't get the stuff close enough to my mouth without gagging from the smell. When I was a kid, I could tell when the lady across the street was making spinach or kale. The wretched smell was everywhere!
Spinach is ok. Just like any other green but not full of insects and grit like Kale and Broccoli. How did spinach give Popeye big muscles and why was his eyesight so bad because Olive Oil was nothing to fight over.