I've seen several of them, usually for charity, some just for fun, but in the end (no pun intended) they get a laugh. So, I've seen the Men of the Stacks, a calendar showing men posing N*de in a Library, or then there was the Men of the Longtom Grange, posing with their vintage John Deere tractor or appropriately placed Guitar.
My wife took the following picture, fully clothed, and felt it would work well in a Men of Kiting Calendar. It's my Bikini shot. . .
Kite by Prism