YOU SAID:

I want your face in my mouth.

INTO JAPANESE

口の中にあなたの顔をします。

BACK INTO ENGLISH

In the mouth of your face.

INTO JAPANESE

あなたの顔の口の中。

BACK INTO ENGLISH

In the face of the your mouth.

INTO JAPANESE

顔に、お口の中。

BACK INTO ENGLISH

Look at your mouth.

INTO JAPANESE

お口の中を見てください。

BACK INTO ENGLISH

Look at your mouth.