Novices and newbies discussion

My boyfriend has lately told me he is interested in chastity. I am unsure of his reasons or what exactly excites him about it. It appears he would like me to hold the key and maintain his lock. He hasn’t displayed any actions that suggest this desire, but we all have our quirks. Still, he comes across as a guy who usually holds authority and isn’t quick to surrender control. Could this indicate he has a submissive nature?