It was just a small painting in his father's study, so I didn't see it often, but it was memorable, probably because my reaction was so different from the one expected of me.
I just tracked it down: A segment of La chute des damnes (The Fall of the Damned), paired with L'Ascension des élus (The Ascent of the Elect), painted between 1468 and 1470 by Dieric the Elder, now in the Palais des Beaux-Arts in Lille, France.
But don't get excited. There are a few butts, but no more wieners.
We know only that he became the "official painter of Leuven" (now in Belgium) in 1458 or 1459, that he was commissioned to do a lot of portraits and religious art, that he married twice and had four children, and that he died on May 6th, 1475.
And that he was interested in muscular male bodies.
Check out The Martyrdom of St. Hippolyte, the center panel of a tryptich that Dierich painted for the altar of the Sint Salvator Kathedral in Brugge about 1470 (now in the Groningen Museum).
Looks like the same guy as the one being carried away by a demon.
Dieric definitely had a type.
His two sons, Dieric the Younger and Aelbrecht, both became painters.