i bet 100 bucks that this shit was started by a woman and people just went along with it because it would be fun and it would be rude to say no. sort of like when someone offers you a cookie and you don't really want it but they made it themselves so it would be rude not to and its not that bad so ou eat it anyway. women often do shit like that, they do stuff you didn't ask for and then act like they did you a big favor.
Sweden