I actually never though I was a sub until very recently. I met my mistress, and within a few days we became very close, and then out of the blue, with no provocation, I asked her to be my mistress, and she accepted~ <3 I was just suddenly aware that this was what I wanted, and was so completely clueless about the topic that I didn't even know the word 'mistress' and used 'master' instead *^^*