Yes, it contains nudity and some of the most twisted sex related scenes I've seen in anime (later I found a youtube video including it in the top 10 of most twisted scenes in animes), one of them (careful,  sensitive content below)

>! including Lady Farnese and a horse. 

When I saw it I thought, what's going on here, is this aired on tv? As a matter of fact I believe an anime like that would be forbidden for all ages in some (or many?) countries.