BOO........pre 18th century.....no, 20th century and in the social stratum BELOW a council estate, but we we taught values even so which have remained to this day. "Stuffy?"...no idea.
Generally speaking, I have never farted in public, never farted in front of my wife, she has never farted in my company and as for the kids, probably did, but no big deal was made of it. I cannot remember anyone farting in class, grammar school or University and one of my description has been DIFFICULT.
But times have changed and us fuddy duddies will be a thing of the past, leaving everybody to their "normal" lives.