Men, how would you flirt with a woman who you are not supposed to be flirting with?

Let's say you're her boss and your company has a non-fraternization policy. Or she is a university student and you are an instructor. Or for some other reason you don't want everyone to know you are flirting. If you wanted to flirt with her, how would you do so? How would you let her know without letting everyone else know?Men, how would you flirt with a woman who you are not supposed to be flirting with?
by simple eye contactMen, how would you flirt with a woman who you are not supposed to be flirting with?
If you are not supposed to be flirting with her, THEN DON'T!
rub my crotch hwen no one else is looking