Not profound at all.
Drek: It's probably all that mucus filling up your sinus cavities.
Hypothetical-Roommate: Probably. I feel like crap.
Drek: You know... if you say "mucus" backwards, it's "sucum."
Hypothetical-Roommate: That's true.
Drek: I don't know why I even noticed that.
Hypothetical-Roommate: Well, it does make sense.
Drek: How does that make sense?
Hypothetical-Roommate: Because that's what you do with mucus. You suck it in.
Drek: I reckon I have to give you that one.