Leonardo Da Vinci's Office of the Night

Most men in Florence were having sex with other men at some point in their lives. This is very much an accepted part of Florentine male culture. People don't go to jail until they're on the kind of fourth offence or so. So if he was, indeed, sleeping with the Archipo Sultarelli this would be very much within the sort of accepted paradigm of what a 24-year-old and a married man in Florence might well be doing.