Advice on whether or not I should watch Watchmen the movie?

I have recently discovered that 3 of my favourite actors, matthew goode, patrick wilson and joseph gorden-levitt, all appear in a movie. This moive is watchmen and i was very excited to go watch it but then did some research on it (as i always do just to check that it's not boring) and it does not sound boring at all, but the thing is it appears to have a lot of sex scenes in it. I have read that it borders on porn and i am someone who gets very uncomforatble in even lengthy kisses. I was wondering, is it that bad? would i be able to get through it? if so i would like to know if any of the aforementioned actors do anything paritcularly racey, as if they do i will probably not watch it as i reckon it would disturb the awesome images i have of them. so yeah... any help is greatly appriciated :)