When you have your entire hand in your girlfriend's sister's ass, and you start singing, "Who stole the cookie from the cookie jar?"

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

Dirty Bradley likes to fuck his brother and when his brother cums he go into his room and suck his dick off like a tomahawk

Dirty Bradley likes to fuck his mom and parents he's eats his brother cum and dick