Notes:

…you ripped a guy's penis off and hurled it out the window like it's no big freaking deal?!? For the love of God, WHY?!? Does this writer have any clue how strong someone would have to be to rip a man's penis off with their bare hands?!? Or how Goddamned painful that would be for the victim?

The alternative, that Snape was somehow grabbed by his penis, lifted off the ground, and thrown out a window, is no better. Having your entire weight suspended off the ground and supported only by a sensitive and relatively delicate part of your anatomy would be the exact opposite of pleasant!!!

The other alternative, that Snape's d--- had already been severed, is just plain unpleasant to contemplate.