Mom doesn't know that either...

...that reminded me 12 years ago, when I was with my school class in a boring little city somewhere in Brazil, having "local school lessons" for a few days, and seated on the footpath of the city's (quiet) main street with a friend, I said…
"Shit man, I really wanna go back to São Paulo! I can’t be bothered to stay one more day in this shit boring city!!!"
Then a local old dude who was in a bike passing through us yelled at me:
"So fuck off and go away, kid!!!"
That was embarrassing and I thought he would bash me up too... :/ Unfortunately the teacher wasn’t around to teach me that we are not supposed to offend the locals and/or their home. It would avoid future problems...