YOU SAID:

makes no sense just to live for fun your head gets smart but your brain gets dumb

INTO JAPANESE

頭の中は頭が良くなるが頭の体はダメになる

BACK INTO ENGLISH

My head gets better in my head, but my head becomes useless

INTO JAPANESE

私の頭は私の頭の中で良くなりますが、私の頭は役に立たなくなります

BACK INTO ENGLISH

My head gets better in my head but my head gets useless

INTO JAPANESE

私の頭は私の頭の中で良くなりますが私の頭は役に立たなくなります

BACK INTO ENGLISH

My head gets better in my head but my head gets useless