ah... interesting topic... I personally think America is way too hung up on sex and nudity. Why is nudity a BAD thing? And that is how society views it... it's so taboo that people are hung up on it. I think MomonBike nailed it. Our society acts like junior high school kids. Sheesh.
I think both pictures are fine. Neither is offensive to me. Two adults engaged in sex is not offensive to me. Seeing a nipple or a bare butt is not offensive to me.
Child pornography and rape... Now THOSE are offensive.
I think it's ridiculous that we're so uptight as a society that telling a coworker "You look nice today" could lead to problems. And yes, in those words... and that is directly from a labor law atty.
There is a fine line between "hobby" and "mental illness".