Making it a habit can make you a whore

The use of the word "habit" pops up in peculiar fashion throughout the play. We first see it in 2.1.138 in a conversation between Giovanni, Monticelso, and Francisco. When Giovanni discusses his plans on creating an army by having the men follow the women, Francisco replies with, "See, a good habit makes a child a man, whereas a bad one makes a man a beast." This, I assume, to be a reference to a nun--and the safe route to avoiding creating a name for oneself.
In 2.2, Bracciano enters with a person in the habit of a conjurer, and, once again, the word habit is used for religious deception.
Once again in 3.2.120-123, Monticelso asks, "Is this a morning habit?" This, ironically comes shortly after explaining the word whore to Vittoria.
The use of religious clothing to describe acts forbidden by the church is countered by Vittoria by lusting for material objects, which the Cardinal did himself.
Finally, in a speech by Flamineo, 4.2.150-162, he states, "Will any mercer take another's ware when it is used and sullied...And yet, sister, How scurvily this frowardness becomes you!" In this we see the words mercer and sister combined with sullied and scurvy.
While this is not to say that only the women of the church are tied to lewdness and acts of debauchery (which apparently are condoned in private by all), they are more often referred to in acts of sexuality. So, it is, at least in Webster's eyes, the habit that makes the whore!