Chapter 90 - The MarkerZhang Yilan's question caused Paola to blush slightly, and Paola smiled gently, not answering her question directly.
After a while, Zhang Yilan had thought that she wouldn't answer, but she heard Paula say, "Every adult has their own unique personal pheromone in them, and this pheromone can be labeled on their opposite sex."
"Every man and woman will properly manage their personal relationships when they reach adulthood. If you have identified the person you will be with for the rest of your life, then you can leave a mark on each other and enter into a marriage contract."
"But how can we possibly run into someone for the first time who is the person we are destined to meet? So that's when the isolation sleeve was born."
"With it, when both parties have s*x, they
