De Plantatione

And in the case of the tree of friendship, it is necessary to cut down and eradicate these things which shoot up by the side of it for the sake of preserving the more valuable plant. And the evil plants which spring up along-side are these: the tricky blandishments of courtesans towards their lovers, and the deceitfulness of parasites to those whom they flatter.

For one may see those who make a traffic of their personal beauty, clinging to their lovers as if they were excessively fond of them; but they love not them but themselves, and they are eager only for their daily gains. And as for flatterers, sometimes they conceal unspeakable hatred towards those whom they flatter; but still, being slaves to gluttony and intemperance, they are on that account induced to pay court to those who can supply their immoderate appetites.