That's because we stole the most interesting language rules from every other language; and the reason why I feel sorry for anyone learning English as a second (third, fourth, twelfth) language.

To paraphrase "Young Frankenstein"

"Igor, just WHO'S grammer rules did you bring me?"
"Ah..yes..Abby something...Normal...Abby Normal, yes that's it"


>
>Afaic it's mice and lice that are special. Not to mention feet from foot while 'soot' is plural and doesn't even have a singular and deer and moose which are both singular and plural. English is a very weird language.