In the swinging lifestyle, a bull 🐂 is a single male, typically well endowed, who plays with a couple, but primarily engages only with the woman. They are important in the lifestyle because they are needed for cuckolding/hotwifing types of relationships. It's crucial to understand that bulls are not there to replace a partner or be in a relationship with the couple. If you identify as a bull, your role is to enhance the play experience for everyone while fulfilling your specific desires (under