Has anybody noticed the back of tanks neck??

Rating: Null/10 (26 May 2003)

On the back of all the others' necks there is a plug, but Tank and his older brother(no longer alive) don't have any. My theory for this is that Tank must not have been harvested or bred or whatever you call it like the others, he must be a real, original, BORN human. I think that should be right...