When one has so many orgasms in a short period of time, that your balls and taint can no longer co-exist with each other and are forced to combine into a super structure, called the Lantern of Socrates

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.