WOW!!! I have got to weigh in on this one!
In my opinion, this film was AMAZING! I was thrilled and engrossed from the beginning. I’ve already seen it three times. My best description is a juxtaposition of X-men and Sin City set in an alternate reality where Nixon never got caught… And believe it or not, I never even heard of The Watchmen before this movie. My bad 
As for the ‘horrible’ male nudity and sex scene, why is it even in the same sentence as the ‘horrific violence’?!?! The violence I’ll give, was graphic and gory but unfortunately, still a pale reflection of humanities’ truly evil depths.
The nudity and sex… try watching ‘Zack and Miri Make a Porno’ and then tell me which movie was really pushing the envelope. The appearance of Dr. Manhattan (WOW) was so bright and blurry; I’ve seen more nudity on Clearwater Beach from grandpas in small Speedos. (OUCH! BAD memories!!) I jest, but remember, humans made the clothes to cover the body. It was the Creator in glory that made the bodies.
And the ‘sex scene’? Ooh, ahh do declare, I saw no sex, but a love scene that made my heart flutter and my breath catch. Whew, I nearly had the vapors! And you say he’s a local gentleman? Available perhaps? Is it warm in here? ;-P