From Suetonius, the Lives of the Twelve Caesars, Robert Graves (trans.), Penguin Books, Revised Edition, 1979, in the biography of Tiberius (44).

Some aspects of his criminal obscenity are almost too vile to discuss, much less believe. Imagine training little boys, whom he called 'his minnows', to chase him while he went swimming and get between his legs to lick and nibble him. . . .

I'll leave it at that, since Suetonius did not pull his punches, and in this case I would have much preferred that he had. He provides graphic insight into the character of Tiberius, a leader who felt himself to be above the law. Why is this important? Because Tiberius is an example of a pattern that continues to reoccur, not just two millenia ago, but today. Read the descriptions of the behavior of Beria or of more modern dictators. For an example closer to home, consider the stories about J. Edgar Hoover. Some people, given immunity from the laws, do not change, but others exhibit an unsuspected antisocial dimension.