You're leaving out my favorite part of that German story.  So they eat the guy's dick and then for part 2 the guy planning on being eaten gets into a bath, they slit his wrist, and then the cannibal reads to him from a Star Trek novel while they wait for him to bleed out.  What really gets me about this though, is how many of us have had sexual fantasies where the first time you tried it things didn't go 100% your way? Maybe you realize that you like latex instead of leather. Or you're not into being blindfolded but you liked being tied down. With this kink, you only get the one shot. I just can't wrap my mind around it at all.