They weren’t horny. It was a ritual of dominance and exile, much like tar-and-feathering. In the days of the Hebrews, death by snu-snu was a common way to dispose of unwanted strangers. The whole encounter was a symptom of the wrongdoing of Sodom, specifically, of hording wealth and failing to welcome the stranger and the immigrant, failing to uplift the poor and feed the hungry and treat the sick.
Fixating on buggery is to distract from modern societies that repeat these same acts of wickedness (looking at you, United States). Wanting to snu-snu the angels was essentially the equivalent of children-in-cages policies today.
Only now, human societies, especially the United States have harnessed the power to raze cities with fire from the sky.
Oh and women who read the story of Lot and his daughters see that he got drunk on his own and raped his own progeny. This act is so common the US has PSA billboards about it (e.g. Your Daughter Is Not Your Date! ). Victim-blaming is also typical.