Any girls in the chat: is this normal?!?!??!? Ain't no way guys do this
I'm a guy but did show choir in highschool. It happens with more outgoing girls, like the type who doing a show choir.
Girls grabbing each other's chest and butt, "gg's" etc. Periods end up syncing which was not fun at all, cause they only sync within the friend group, and you get groups of girls at different points of their cycles.
Also more likely to happen in Asian cultures but not always. There are sisters who get handsy straight out of manga, with lines like "Wow big sis, your boobs look heavy, I shall be your support". Etc
At least in Japan, awhile back there was a trend of girls going to love hotels with each other, cosplaying and try ons then ordering snacks and having a party.
Oh and us guys so weird shit too but not like that. One time we got ahold of red duct tape and created tape swords and shields, and one guy made samurai armor out of it and had is do gladiator fights in only belts, boots and undies.