Who Will Help Jack Off the Horse?

"...and of course the whimsical poetic meter known as iambic tetrameter is no more capable of exclusive ownership than the air we all breath."--Bimisi to Theodor Seuss GeislIt is entirely possible to wake up in the morning with no intention of learning anything at all, but learning something substantial, nonetheless. It was a typical Wednesday afternoon at their favorite dive bar. Bimisi and Sumguyen were sparring, via a spirited match of online trivia, with patrons of a similar dive bar in another part of the world...a part of the world where it most likely was not still Wednesday afternoon. The final question...at least the last question they heard before scrambling for a pen and paper to get to work on their first parody was this:Madonna, Michael Jackson and _____ are the only 3 artists who have had a top 40 hit in 4 different decades.ANSWER: Weird Al Yankovic