Anything is possible. I doubt the stories. Slaves cost money....Rome was nothing if it was not the World's Economic Drain.
Remember what the implications of reading such things are, and whom they are written for. If Edw. Gibbon had written it, I might buy it, but that world, as with the Greeks and the Egyptians, anthropomorphized their Gods or their Gods' activities in an effort to understand their world. These stories were not intended to excite prurience, but to explain thunder, and floods, and fire, war, death, disease, human misery.
It is always easy to assign behaviors to "those people over there", or " back then", because it really cannot be proved. Perfect example? Take a gander at how much of today's politics is colored by lies and misinformation. Wishing doesn't make it true, and time does not legitimize a lie. But this crowd seems to absolutely ACHE for legitimacy.
THAT only comes from inside, when you're talking about a non-societally accepted activity.