In season seven, Karl seems to be fighting a new experience by using condoms on the Aqua Teens yard. On the other hand, Frylock gives an idea about the condom used to enhance sex and re-track things. Meatwad tries to deal with Karl by bringing him to life, despite Frylock's protest
Classic roles notwithstanding, the personality types of the main trio have, of late, revealed themselves as gradually dynamic, suggesting a genuine (if muted) passage of time in the show's universe.