by Sir Apocalypse
Being a submissive boy isn't always about just being passive to his Sir. It's about mutual communicated goals, time spent together in and out of your sexual play, commitment to the process and pleasure mutually for both the Sir and the boy. I believe you can achieve this with a verbal or a written contract. That way it's a written record of what you both agreed on together through your journey with your Sir.
If your goal is to be someone's boy know that a successful Sir/boy relationship is based on mutual service with respected roles for each other.