These have been around for a couple of years now and I believe that they are indeed fakes.
The back and forth on the veracity of the pics has gone on now for about 6 years, but everybody seems to have forgotten that they originated on Billy Master's Filth 2 Go site. He posted the frontal pic everyone has tried to tear apart, but he also posted another shot of Jeff wearing boxers and in about the same position as the frontal. You can clearly see his face and the background is identical, but from a slightly different angle.
People see to agree that the body and penis in the side vew without face matches the body and penis in the frontal, they just assume a paste job for the face. Well, that other pic seems to logically connect all the pics and put an end to (at least for me) any arguments.
I'll post the missing pic with Billy Master's orginal stamp as well as a pic of Jeff that appeared in a tabloid at the same time the other pics surfaced to show that the bodies in all the pics are indeed the same.