Quoted By:
Just to avoid any confusion, I have created this horribly-drawn but nevertheless informative chart illustrating what counts as PSFB and what doesn't. PSFB is basically where:
1) The girl is seen from behind (that is the "-SFB" bit of "PSFB"). Standing, bent over or kneeling are all fine. Straight on or at an angle are both OK.
2) There is something visible between her legs that is not her butt. So anatomically, this would have to be her vulva, labia and/or her perinium, or generically her pussy (that is the "P-" bit of "PSFB").
3) Whatever is visible between her legs is clearly not censored. By this I mean it's not all black. Of course we aren't expecting to see her slit, but it's a bonus if the original, unaltered image shows or suggests it in some way.
So, referring to the pic, the two on the left are fine, the two on the right aren't. The one in the middle is debatable - if it could conceivably be pubic hair then I guess that's fine, but if it's deep shadow censorship then it's not. Light shadow is acceptable because that would only be natural.
OK, autist attack over. More PSFB from me later.