Are you implying that there is a legit use for PK's?
The simple answer lies in the fact that if you don't have problem shoving a needle in your ass everyday, why should you have a problem shoving anything else (whether it be in your ass, down your throat, whatever) ~ here today, gone tomorrow.
As long as everything feels O.K today, it must be O.K., then, right?
Bodybuilders as a whole (hole?) are showing more and more selfish stupidity every day. It's too bad they can't be monitored guinea pigs, b/c they are the only ones willing to do the things that the general population does not. Doctors and Scientists could stand to learn quite a lot from them, if they could just monitor how the internal organs and the human psyche respond to such excessive behaviour and disregard.
It's all about the muscle... and it isn't even permanent. Hell of an investment.