You haven't heard of fish cooked on a plank, so you make a silly joke about it? It's a very good outdoor cooking method, done with salmon, as well. Maybe you haven't even heard of shad!
I have caught and eaten many species or fresh and salt water fish here on the east coast. I have never planked fish..but I figger it must be tasty or why else would one do it.
Although never having eaten Shad or catching them for that matter, on a couple of Boy Scout canoe expeditions with my 3 sons, on the Delaware river, on the NY/PA border, I watched as anglers reeled in countless numbers of them.
My task was not to denegrate the planking of fish....it was in fact meant to denegrate the 2 people I mentioned and their lifestyle. the fish cooking method had, to my demented mind a humorous ring to it...so I co-opted it for denegration purposes.
No fish or lesbians were harmed in the making of this post.