The mods don't care.
Say you'd like to cut someone's off, or stick a red-hot poker through them, and that's OK - it's perfectly alright, encouraged even, to expose any person reading this site to the glorification and advocation of grevious bodily harm and murder.
But dare to use a non-offensive term for a part of the body like that, and who knows what damage you might do to impressionable minds. Heaven forbid - you might teach them something, and that wouldn't do, for where would the next generation of ignorant slavering barbarians come from?
The mods will hide from you, and you will never, ever, get them to justify their actions - they are either too afraid to come out from behind their delete button, or they have just enough brain cells to realise that they cannot justify themselves on any rational basis.