YOU SAID:
humans will dye their hair untill their head falls off
INTO JAPANESE
頭が落ちるまで人間は髪を染める
BACK INTO ENGLISH
Humans dye their hair until their head falls
INTO JAPANESE
人間は頭が落ちるまで髪を染めます
BACK INTO ENGLISH
Humans dye their hair until their head falls
That didn't even make that much sense in English.