I had a friend in my childhood who probably became one. In Japan, sexually deviant lifestyles like this while maybe not accepted, aren't open to scorn like they are here. Many video games had "animal women" characters, bodies designed to be sexually provacative. He was always drawn to them a bit more then what I thought was healthy.
I never knew if he went full tilt furry. We lost touch about the time I turned 15. But he certainly was the type who could have.