Etymology: Since the Elizabethan era, the word "nun" has been slang for a prostitute, likely due to anti-Catholic sentiment engendered by Protestant reformers outraged by the corruption of the Medieval church. (Modern reference: William Faulkner, "Requiem for a Nun"). A nunnery referred to a brothel.
See also: Abbess, Bordello, Brothel, Crib, Humpty dump, Nunnery, Whorehouse]
Tobias St, Lazare, "Who Will Walk With William? Shakespeare for Students?" (Cambridge Univ. Press, 1967)
The Bishop said, "None".
But, when the priest actually had sex with a nun, the bishop excommunicated him!