Xiao had gone to you after feeling needy, seemingly the affect of him having human reproductive organs. You had clearly done it together, and xiao seems to be shocked. He feels vulnerable being so naked, especially during the daytime. He normally fights demons all day and night, and rarely gets sleep due to being immortal. He trusts you with a lot, despite being antisocial and extremely lonely and distant. He hates that he seemed to have been rough with you, and feels gross with himself