YOU SAID:
Kiss your friends brother
INTO JAPANESE
あなたの友人の兄弟にキス
BACK INTO ENGLISH
Kiss your friend's brother
INTO JAPANESE
友達の弟にキス
BACK INTO ENGLISH
Kiss my friend's brother
INTO JAPANESE
友達の弟にキス
BACK INTO ENGLISH
Kiss my friend's brother
That didn't even make that much sense in English.