i think the foundational tumblr experience for me was seeing a gifset getting reblogged all over the place around 2012-2013 of a girl in her underwear running toward the viewer and her boobs were like jiggling around. jopping about. and all the comments were like, whoa anime boob jiggle actually is realistic! weaboos you win this one! anyway she was wearing a bra that was too small. because the gifset was from a porn vid