Hey, it was inevitable that someone was going to create this thread sooner or later... But anyway.
How would anyone even begin to describe this macabre-like matrimony of two individuals of the opposite sex, trapped in the same body. And more importantly, how could both of them end up being sexually attracted to each other and be okay with their fleshy circumstance... Sure, one could argue that sex and sexual attraction is purely a state of mind, but with this "arrangement"... C'mon.
We all know the story of Adam and Eve, and how Adam created Eve from one of his ribs. Strangely enough, this scenario isn't too far from that in it's own twisted way. And the fact that they're both still "joined at the hip" means that Kenji still has room for improvements (on Martha) if you know what I mean. Whether Martha would approve is another discussion.
Still, does the fact that he created her body from his own flesh and blood and that they're obviously attracted to each other, mean that when they inevitably bump uglies... they're having real sex, or is the reality that Kenji is just masturbating with a foreign object lodged in his flesh that just so happens to be a living consciousness.