 It was revealed that in some episodes, Lumpus was a former Bean Scout from the same camp when he was a young kid.He is always in a bad mood and this horrible disposition could have been caused by his parents' failure to visit him at camp when he was a Bean Scout and tell him that they love him or even show any signs of care for him.It was seen in the episode "Slug Fest" that Lumpus does appreciate Slinkman.