I find this plausible. The professor was thinking about the experiment and in his mind he was showing the audience the results of an experiment not waving his dick at the crowd. The crowd’s reaction must have snapped him out of scientist mode and back into social mode and he realized what he was doing.
I’ve heard similar stories about women right after they get nipple piercings or breast augmentations. Women who would never normally flash their boobs in public will unthinkingly pull their tops up so people can check out the results of their operation.
Some years ago I read an article about that conference where the urologist did the show-and-tell demo of his discovery – but the story, as I recall it, had a very different twist. Maybe it was a different conference where he did the same show-and-tell?
It was a conference of urologists (no mention of their spouses or anyone else being present), and it seemed from the description that the assembled audience, being professional urologists, were professionally impressed, with various people going Ooh! and Oh!, several even reaching out to touch the demonstration as he walked past.
I watched Alive the other day, and 18 people surviving a Winter and avalanches in the Andes, with no food other than the dead humans, and no shelter other than the plane, seemed improbable. Two of them travelling 40 miles across the Andes, with no gear, to get help, defied belief. But it happened.