YOU SAID:

There's a man riding a horse on top of my chest.

INTO JAPANESE

私の胸の上に馬に乗る男があります。

BACK INTO ENGLISH

Man horse to ride on my chest.

INTO JAPANESE

男馬に乗る私の胸。

BACK INTO ENGLISH

My man horse's chest.

INTO JAPANESE

私の男馬の胸。

BACK INTO ENGLISH

My man horse's chest.