Who invented adult movies?

Who invented adult movies?

Adult movies, or X-rated, Porn or whatever you want to call them, have been around since motion pictures first became possible (Silent movies...but there were naughty movies right away. Early porno's from the 1900's are quite valuable and collectable now, but are pretty tame stuff by today's standards...If the woman showed some leg, or maybe a knee and a garter belt...that was juicy stuff back then. Really hard core stuff was banned for years in U.S. and so movies showing actual genital penetration and intercourse were smuggled into the u.s. and shown covertly. Often called French Movies they were pretty much like the ones today, except minus the tacky music.