Seems like "Funny things you've heard about Guinness" could be its own thread. BMC drinkers just can't wrap their heads around a pitch-black beer with a light body and the same amount of calories as a Budweiser.
I gave a brief dissertation on the Guinness, commercial ABV and the difference between lagers & Ales!
I think I equated it to soup. They both have broth, but stews have more stuff in it & Lagers are like a broth made from water and bullion cubes.
therefore Lagers are crisp & clean void of any "stuff", Ale can have lots of "stuff" and that stuff are usually hops!
I know I am not accurately correct, but I was explaining this to 2 lager drinkers in their late 60's. Neither is going to start drinking IPAs or my homebrew.
So giving them the basic idea, which they have probably forgotten seemed fine.