"Don't know if you noticed, but there is a difference between a docent explaining museum exhibits and a college presentation."
Ain't that the truth. I was a docent for a short time in an art museum, of all places. They needed volunteers, so I volunteered.
My favorite visitor was this guy who spoke up during the tour, as we were viewing a Kandinsky and said, "All that modern crap is just junk. It's not art. Surely you don't believe it's art do you?"
All I could do was shake my head slowly and continue with the tour.
LOL!
And how many folks told you they had a 5-year-old kid that could do better? I used to get that one ALL the time!
Your patience does you credit. I suspect I would have strongly invited him to leave the tour if it offended him.