Go the library and have them borrow for you (it's probably not on the shelves) "Twisted Tales From Shakespeare" by Richard Armour.

Then read the plays that are in Armour's book.

([Armour] attended Pomona College and Harvard University, where he studied with the eminent Shakespearean scholar George Lyman Kittredge and obtained a Ph.D. in English philology. He eventually became Professor of English at Scripps College and the Claremont Graduate School in Claremont, California.)