But these speak evil of those things which they know not: but what they know naturally, as brute beasts, in those things they corrupt themselves.
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Clement Of Alexandria
AD 215
He means that they eat, and drink, and indulge in uncleanness, and says that they do other things that are common to them with animals, devoid of reason.
These men blaspheme whatsoever things they know not, as it is the custom of false and ignorant teachers: and as to things which they know by their senses, in these they are corrupted, following, like brute beasts, their natural lusts and appetites. (Witham)