trys way to hard to please the opposite sex but never gets anywhere

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.

When you are doing doggy style with a girl and you hear a fart like noise and you are unsure wether it was a fart or a queef.