in this context it's an [often naive] sexual obsession with power
he basically wants to dominate submissive women, and thinks you might be a good subject - be very careful - some of these people are very wise and good-hearted but many of them are lost and confused enjoy nothing more than corrupting youth and beauty
Be silent whilst I adjust your gag!
An over-simplification. A dominant want the other person to do what the dominant wants; a submissive wants to do what the dominant wants. Dominants can be either gender, submissives can be either gender. Sex in some form MAY be involved but not always. I am submissive to The Woman Who Is In Charge Of My Life (but not my sex life because sex is not part of our relationship.)
He is wanting you to submit to his desires... In a s3xual way that is.... Could be fun, but you should get to know him first. Not everyone is into that kind of stuff.
how dare you speak!