On Fasting - Tertullian,

I should wonder at the Psychics, if they were enthralled to voluptuousness alone, which leads them to repeated marriages, if they were not likewise bursting with gluttony, which leads them to hate fasts. Lust without voracity would certainly be considered a monstrous phenomenon; since these two are so united and concrete, that, had there been any possibility of disjoining them, the pudenda would not have been affixed to the belly itself rather than elsewhere. Look at the body: the region (of these members) is one and the same. In short, the order of the vices is proportionate to the arrangement of the members. First, the belly; and then immediately the materials of all other species of lasciviousness are laid subordinately to daintiness: through love of eating, love of impurity finds passage. I recognize, therefore, animal faith by its care of the flesh (of which it wholly consists)—as prone to manifold feeding as to manifold marrying—so that it deservedly accuses the spiritual discipline, which according to its ability opposes it, in this species of continence as well; imposing, as it does, reins upon the appetite, through taking, sometimes no meals, or late meals, or dry meals, just as upon lust, through allowing but one marriage.