Stephen Hillenburg : (4) " SpongeBob is just made of cellulose, but he has parents who are natural sponges – he got the square gene. " - Stephen Hillenburg " I wanted to do a show about a character that was an innocent, and so I focused on a sea sponge because it’s a funny animal, a strange one. " - Stephen Hillenburg " We wanted the humor to come from the characters and their world – you go down there to escape the world up here for a while. So when the crew would write jokes that would refer to American TV or culture, I’d just eliminate them because it just seemed odd that SpongeBob would know about it. " - Stephen Hillenburg " I never really imagined a show about a sponge going past our first season. I thought maybe we’d have a cult following, and we’d be gone after one season. " - Stephen Hillenburg