YOU SAID:

there's an eyelash on your cheek

INTO JAPANESE

頬にまつ毛がある

BACK INTO ENGLISH

You have eyelashes on your cheeks.

INTO JAPANESE

頬にまつげがついている。

BACK INTO ENGLISH

There are eyelashes on my cheeks.

INTO JAPANESE

頬にまつ毛がある。

BACK INTO ENGLISH

I have eyelashes on my cheeks.

INTO JAPANESE

頬にまつ毛がある。

BACK INTO ENGLISH

I have eyelashes on my cheeks.