draw a blank

Painting you do on your girlfriend's face when you shoot blanks.

Guy: This guy told me, that his girl left him post his prostate surgery because he can only draw a blank on her face.
Listening guy: 'tf are you talking about
Guy: He told me, she is rubbing some other guy, who is into face painting her face and she thinks it makes her face look ten years younger.
Listening guy: Yea, whatever