He loves how she makes eye contact. She comes to stand very close to him boldly. Then she asks a question with genuine interest. The way she looks at his eyes seems even ardent. He can’t keep the eye contact because he won’t be able to resist smiling in front of her. He admires her mature behavior of the experienced person even though they have the same age. She knows how to be attractive.
She is doing the same thing to another guy right in front of him.