So Janet (Roseanne Barr) Was Dicks.... (SPOILERS)
Cousin?!?!
I mean, the big giant head knowingly sent janet to earth to work with dick on the mission as his WIFE and have sex and love eachother as partners!
I get that their "superior race" does not think much of human customs or anything, and the big giant head might have seen this as him working with and getting to know family, its pretty funny that the big giant head's lack of understanding/knowledge of earth would cause his son to unkowingly commit to incest.
I dont know how much stock they would put into earth based incest as they dont seem to have gender. It would still be considered "love" and "marriage" between "family" as those things still seem to exist to some exent in their purple tube society.