Dr. Ullible had often puzzled about his initial Hooahbear encounter, when he was called a “human bean”. He knew he didn’t act like a bean, nor did he smell like one (even when he put one up his nose at the age of four and had to go to the doctor to get it removed). Although his mother occasionally called him “a bean sprout”, she also called him “pumpkin” so he assumed those were terms of endearment and not an actual physical attribute. Fortunately, in the Hooahbear medical journal, the NEJQ, he found a well written article by Dr. Galen about human beans. Apparently Dr. Galen overheard a mother of three telling a friend that her children were just “sprouting up” like weeds. Dr. 
Galen thus made the assumption that humans are an offshoot of the plant kingdom.
This false assumption became mainstream information and has been perpetuated by the discovery of the belly button, or “bean button” per Hooahbear lingo on humans. Once an idea like this gets hold, it is very difficult to take a different view of the matter. It would require a major change in Hooahbear culture to get them to not look at humans as some sort of alien plant form.