Tasting her lips

She had turned more human than he had thought, she was not even psychologically affected by these small things.

"Since you don't like the makeup, why did you put it on?" he asked, tilting his head.

"Uh, I do not like much, but this small amount is fine." she replied, "but I do not eat it," she added, trying to hint him subtly that waiting for makeup is not good for health. 

But he was still looking at her, with blank expressions. "I never lick or eat my lipstick" she added more bluntly and then pointed at his thumb which he had used to rub and lick her lipstick.

Finally getting what she was seeing, he was speechless. Such a sensual step was just eating makeup in her eyes. He was licking so sensually, other ladies just had an orgasm, looking at him like this.