From He who established the Tarot

[Tenet Nosce]

To understand the temporary aspect of the flesh, one must come to understand the difference between the material and the immaterial. And as humans this has always been done through the acknowledgment of earth and sun, matter and Spirit.

I don't know how authentic the Rider-Waite tarot deck is to the original images, however "The Devil" card seems to me most representative of addiction to the flesh. I observe that the chains about their necks are large enough to be able to be cast off at any time, therefore I conclude that the man and woman remain there voluntarily.