What is this movie about?

Rating: Null/10 (12 September 2011)

OK, let's get this out of the way first, Kate Winslet is great in the movie. Personally I don't like as much nudity as there is in this movie, by the 4th sex scene I was like "right, they were having a lot of sex, now was it necessary to portray all their positions?".
I really don't get a lot of things in this movie...
Boy meets older woman, she has sex with him many times, and he says she's everything to him. That's... not romance LOL that's puberty, lust, whatever you name it... women provided sex, boy was there to take it. He needed her as much as he needed sex. That's OK, now, when she leaves, is he devastated for life? Or later on he was upset because she was SS?
Later when he's in law school, he keeps doing all those "OMG she's SS" faces throughout the trial... now what was that really that he was feeling? Was it "OMG I shagged an SS guard!"? Or maybe "OMG I gotta do something!"? Or maybe "OMG It's the 13th trial session and I still can't get over this! OMG again!"? Or even just "OMG"?
Then he goes to talk to her and gives up. Was he still mad at her? Was he ashamed of talking to her? Was he trying to preserve her dignity? After all, he wasn't meddling in the trial, he was merely talking to her about it... there was nothing bad about even visiting her.
Alright, then he says nothing, woman goes to prison for 20 years, and then he goes to visit her. He goes all cold, trying to teach her some morality or something in the dinning room... what was that? Was Michael really that shallow and childish as to be mad about her for being an SS guard in a time of war? Or was he still mad, which wouldn't make sense, she was just a shag, he was even looking at the other girls, they're "romance" wouldn't last long...
I bet the book makes a lot more sense, because the movie just didn't cut it.