What can I tell you? We all have our areas of expertise.

Like most people, I had already heard of Gorske. He has been on “Oprah” and in the book of Guinness World Records.

I suppose I figured he was a little weird and would have left it at that, but then the card arrived and I wound up calling him at the Waupun Correctional Institution, where he worked as a guard (he’s now retired).

Gorske turned out to be a hard guy not to like. He was self-effacing, copped to being a bit obsessive-compulsive, and understood that many people might shake their heads at his particular obsession.

When I asked if he was worried that others might emulate his unusual diet, he said, “Who’s going to eat Big Macs every day besides me?”

I concluded that Gorske is just a guy who likes Big Macs.

OK, a guy who really likes Big Macs.

He has received criticism anyway, from various health experts and nutritionists, and he was featured in the anti-fast food documentary, “Super Size Me.”

Still, when we spoke last week, he said his health is fine. Gorske is not overweight, and he has always had good cholesterol numbers.