It's better to read Caligula's biography in Wikipedia. He wasn't evil in his first years of reign. He was wise and people loved him. But after some time he became insane and he did some unrighteous deeds. But this movie is too exaggerative. Excessive insist on sex (which most of them were not based on truth) harmed the drama and lowered it to a B-movie, in spite of famous actors. For me, it was a waste of time. I don't recommend it to anyone. But be careful! The sex scenes are really done and explicitly shown. Porn offenders must not watch this. Instead they can watch the R-rated 90-min version and you miss nothing, because sexual scenes have nothing to do with the main plot.