I'm sorry, I had noticed you weren't the same person, but must have somehow forgot it while composing my comment. Anyway. The precise function of makeup varies

I'm sorry, I had noticed you weren't the same person, but must have somehow forgot it while composing my comment. Anyway. The precise function of makeup varies, but the specific case of lipstick is, as I already alluded to, designed to subconsciously simulate attraction through the mimicking of flushed lips. That's pretty much exactly the "illusion of having emotions one doesn't really feel" - and far more directly sexual than merely holding eye contact.