His doctors speculated his infection might have been a rare case of cryptic transmission from sharing meals and bathrooms with his coworkers, one of whom apparently had a tapeworm infection.
Doctor: "Well, it could be a rare case of cryptic transmission from sharing meals and bathrooms with one of your coworkers".
Man: "That sounds really far fetched. Is that the only way I could have gotten it?"
Doctor: "Or you ate the ass of one of your coworkers".
I imagine it went something like this:
Roddenberry: In the evil dimension, everyone sports goatees - the most evil facial hair style.
Shatner: Everyone, except evil Kirk.