What bothers me about nudes is that they so often deny sexuality. In our culture, open nudity IS about sex unless one is taking a bath or a shower. So, what is there to be offended by? Seeing a (typically) young naked man or woman draped over a rock, or leaning against a tree is so patently false it's almost laughable. SHOW the arousal...give a REAL reason for posing without clothes instead of the uptight attitude that manufactures a silly excuse to bare it all. Or, just don't bother.
I'm not sure what your point is. Are you having a hard time finding images of people who are sexually aroused, or nude images that are intended to be sexually arousing? Or you just want more of them on APUG?