I just recently found out that my SO was quite the sub, and we've been experimenting with a little D/s play recently.

Although the concept is not new to me, this is the first time I've acted as a Dom. Any advice from someone thats done this a lot? Any pointers would be greatly appreciated.

Also - I'm really hesitant about this, since I'm afraid I'll really hurt my gf accidentally. Is there a way to keep this 100% safe?