John Chrysostom — as excerpted in the Catena Aurea on Luke 15:11-16

“(ut sup.) Or he who is destitute of spiritual riches, as wisdom and understanding, is said to feed swine, that is, to nourish in his soul sordid and unclean thoughts, and he devours the material food of evil conversation, sweet indeed to him who lacks good works, because every work of carnal pleasure seems sweet to the depraved, while it inwardly unnerves and destroys the powers of the soul. Food of this kind, as being swines’ food and hurtfully sweet, that is, the allurements of fleshly delights, the Scripture describes by the name of husks.”