But about a third of HN has wanked to John McCarthy's metacircular implementation of Lisp in Lisp, so that is porn.
And, look, he basically even admitted it in History of Lisp, in a paragraph directly referencing the implementation of the above interpreter:
"The unexpected appearance of an interpreter tended to freeze the form of the language, and some of the decisions made rather lightheartedly for the “Recursive functions ...” paper later proved unfortunate. These included the COND notation for conditional expressions which leads to an unnecessary depth of parentheses, and the use of the number zero to denote the empty list NIL and the truth value false. Besides encouraging pornographic programming, giving a special interpretation to the address 0 has caused difficulties in all subsequent implementations."
It was pornographic programming, as admitted by the author, and hackers wank to it in a circle to this day. Open and shut case, pretty much.