YOU SAID:
I need to pee and you need to poo
INTO JAPANESE
私はおしっこをする必要があり、あなたはうんちをする必要があります
BACK INTO ENGLISH
I need to pee and you need to poop
INTO JAPANESE
私はおしっこする必要があり、あなたはうんちする必要があります
BACK INTO ENGLISH
I need to pee and you need to poop
That didn't even make that much sense in English.