A rare sexual maneuver, that is an inversion of the Eiffel Tower. A third male joins the normal Eiffel Tower formation, wherein he receives a hand job from the dominate hand of the female participant. As a result all three men must touch hands to form the Pyramid of Giza.

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.