YOU SAID:

the cat pees on the face of my friend

INTO JAPANESE

私の友人の顔に猫のおしっこ

BACK INTO ENGLISH

pee on my friend's face

INTO JAPANESE

私の友人の顔におしっこ

BACK INTO ENGLISH

Peeing on my friend's face

INTO JAPANESE

友人の顔におしっこをする

BACK INTO ENGLISH

pee on a friend's face

INTO JAPANESE

友人の顔におしっこをする

BACK INTO ENGLISH

pee on a friend's face