Lives of the Caesars,c. 122
Caligula had not the slightest regard for chastity, either his own or others’, and is said to have had sexual relations, both active and passive, with Marcus Lepidus, Mnester the pantomime dancer, and various foreign hostages; moreover, a young man of consular family, Valerius Catullus, publicly announced that Gaius had been his passive sexual partner and had completely exhausted him with his demands. Besides incest with his sisters, and a notorious passion for the prostitute Pyrallis, Gaius made advances to almost every well-known married woman in Rome; after inviting a selection of them to dinner with their husbands, he would slowly and carefully examine each in turn while they passed his couch, as a purchaser might assess the value of a slave, and even stretch out his hand and lift up the chin of any woman who kept her eyes modestly cast down. Then, whenever he felt so inclined, he would send for whoever pleased him best and leave the banquet in her company. A little later he would return, showing obvious signs of what he had been about, and openly discuss his bedfellow in detail, dwelling on her good and bad physical points and criticizing her sexual performance. To some of these unfortunates he issued, and publicly registered, divorces in the name of their absent husbands. No parallel can be found for Gaius’ far-fetched extravagances.