However, I will say that reading the classics in their original Greek and Latin has added a lot of sanity to my life, and I would recommend it to anyone. Your own conception of Greek and Roman sexuality is highly romanticized, and would fall away with a course of general reading.
This is not to say that I would hold the ancients forward as examples of "sane" societies. Generally the opposite, in fact. General societal sanity is a post-Enlightenment condition.