"Therianthrope" is just a fancy term for people that want to feel special and tell everyone they have the soul of an animal. They were probably not paid attention to as a child, which explains their incessant need to be set apart and feel different. This doesn't work, however, and they wind up looking like loons. They frequent sites like Gaia Online and numerous MMORPGs, as most geeks do.
John, a therianthrope, swears that he has the soul of a golden retriever. He has recently taken to sitting on his porch & barking at all the people that walk by.