i met my Master on this site as well, so i think i'm gonna take a shot at your question. Master is in reference to a Dom. One of the more common titles (or so i've noticed) that pets/subs/slaves etc, etc use when addressing their Dominant. Others include Sir, Liege, Owner and there are many, many others. i don't really think Master implies something specific, though it may be more common in power exchange situations.... Hope that helps!