Zelyn's face turned red, clearly visible and could be seen by Axel who was currently laughing because he knew that the woman was actually very ashamed of him. He was actually very happy when he saw the blush on the beautiful face that he missed all the time.
Earlier, he accidentally said that intimate thing to tease Zelyn. However, when he saw the face of the woman who he thought was very adorable, it made him want to tease him more.
He knows information about the world around women's problems because he used to date a doctor who specializes in Obstetrics and Gynecology who deals with women's health. The many educated and degreed women he had dated, made him understand the different types of women and their characters.