YOU SAID:
love is a chemical in your brain that encourages humans to breed
INTO JAPANESE
愛は人間の繁殖を促す化学物質です。
BACK INTO ENGLISH
Love is a chemical that promotes human reproduction.
INTO JAPANESE
愛は人間の繁殖を促進する化学物質です。
BACK INTO ENGLISH
Love is a chemical that promotes human reproduction.
That didn't even make that much sense in English.