YOU SAID:
He went back to the back party because he likes the backs of backbones
INTO JAPANESE
彼はバックボーンのバックが好きだからバックパーティーに戻った
BACK INTO ENGLISH
He went back to the back party because he likes backbone back
INTO JAPANESE
彼はバックボーンバックが好きだからバックパーティーに戻った
BACK INTO ENGLISH
He went back to the back party because he likes backbone back
That didn't even make that much sense in English.