Blunt's descent into "the common shore"

The side plot involving Blunt's cozening at the hands of a prostitute and con men shares several characteristics with earlier tales in Medieval and Early Modern literature. In Boccaccio's Decameron, Andreuccio (Day 2, Story 5) suffers a similar fate: just as it appears that he will sleep with a Neopolitan prostitute, he steps on a faulty plank and falls (I might add that he too is naked) into a sewer. The descending bed can be found in both Amadis of Gaul and The Faerie Queene. Does the intertextuality of this side plot comment on the fact that Blunt falls for an "old trick"? In other words, does Behn consciously use old stories to create this "old trick"? What does this say about Blunt's character, especially in comparison to the more heroic and witty rovers and gallants in the play?