Actually there are books and documentaries on the subject. The books are excluded from classrooms and the documentaries disappeared a decade plus ago. Only leftist homosexuality and degeneracy is taught and reinforced. While what you suggest does in fact exist, it was not the norm and it was not socially acceptable. It's leftist revisionism which pretends it's was normal or standard fare. Let alone socially acceptable. Look at America 1970s and that's not far off from the reality of Greek/Rome in this regard.