The original post: /r/todayilearned by /u/GetYerHandOffMyPen15 on 2024-12-05 03:55:18.

Original Title: TIL that Robert Fulton, developer of the first commercially successful steamboat, was involved in multiple polyamorous relationships. One lover, Joel Barlow, wrote him letters in baby talk threatening to cut off his penis. Fulton asked his wife to join a foursome with the Barlows, but she declined.