Wikipedia comes across as a free encyclopedia to create scandals. It is one such scandal! The info will be posted under the label WTF (75).
The contemporary sources, Philo of Alexandria and Seneca the Younger, describe an insane emperor who was self-absorbed, angry, killed on a whim, and who indulged in too much spending and sex. He is accused of sleeping with other men's wives and bragging about it, killing for mere amusement, deliberately wasting money on his bridge, causing starvation, and wanting a statue of himself erected in the Temple of Jerusalem for his worship. Once at some games at which he was presiding, he ordered his guards to throw an entire section of the crowd into the arena during intermission to be eaten by animals because there were no criminals to be prosecuted and he was bored.
While repeating the earlier stories, the later sources of Suetonius and Cassius Dio provide additional tales of insanity. They accuse Caligula of incest with his sisters, Agrippina the Younger, Drusilla and Livilla, and say he prostituted them to other men. They state he sent troops on illogical military exercises, turned the palace into a brothel, and most famously, planned or promised to make his horse, Incitatus, a consul, and actually appointed him a priest.
The validity of these accounts is debatable. In Roman political culture, insanity and sexual perversity were often presented hand-in-hand with poor government."