>>3669907>>3669918it's a a form of escapism. In japan everything is rather grey and reserved. Showing power level emotions would just isolate you from everyone since they'd think you're weird, have bad manners, and can't control yourself.
same thing with the ero pantsu thing, japanese women are very reserved and non lewd. Don't expect them to have a dildo and buy sex toys or some shit like westerners do. In other words it's a job to be "kawaii", that's why japanese men spend so much money for maids, hostesses, and general attention by some thot who plays the role of a candy-fucked ugu girl. They want a cute who treats them like a baby, something they can't have irl.
Same with all the nip girls on twitter who show cleavage and kawaiipeace face. Scroll down a bit and you'll see they're selling a vid and shots somewhere. It's all just a job, some women enjoy the attention (most of those work at maid cafes) and some literally just play a role until they go home.
Basically everything you mentioned in regards to anime culture is a comedic exaggeration, from humor, sex, to just basic everyday life. Also don't forget who the people are that create manga, anime etc, they are usually loner neets who want to "break out" through their works, the more detached they are from rl, the more twisted their works become. We could delve into psychology for hours...