Ah, the world of fetishes! And speaking of personal universes, cuckolding (or cuckolding, in plain Portuguese and with poetic license) is one that shines with a... peculiar charm. In a humorous and objective way, imagine the scene: it's not about betrayal in the traditional sense of pain and suffering. Far from it! Here, "betrayal" is a consensual spectacle, a threesome (or more) where the partner (the cuckold, usually a man, but can be a woman, the term is cuckquean) feels excitement and pleasure in seeing or imagining his/her partner having sex with another person(s). It's like being the director of an erotic film where you're not the main actor, but the thrill of watching your star's performance turns you on. It's a game of power, of losing inhibitions, of seeing your partner's desire for another person(s) and this generating a huge turn-on in you, who are there, watching or just aware of the situation. It's about breaking taboos within a relationship of trust, where the "horn" becomes the crown of the king (or queen) of fantasy!