Did Milton Write a Bawdy Ditty?

NPR considers the possibility:

A little-known poem has been retrieved from the Oxford University archives, which appears to reveal a 17th century attempt to besmirch the reputation of John Milton, the author of Paradise Lost. The poem is a bawdy ditty laden with sexual innuendo, and is labeled "by Milton." However, since Milton is best-known as a great religious and political polemicist, it hardly fits with the rest of his work -- and some academics believe the poem was actually the work of a jealous political rival.

The poem in question with more about it on HuffPo.