Well, before I unlock you're little clit today, I want to point out some features of your new environment. I'm sure you'll have noticed some of them before we switched off the light once you where chained up, but I'll go through them all anyway.
Now, you'll obviously know that big heavy metal collar you're locked in is chained to that wall in two places. You'll also know that the chain shackled to your ankles runs through an eye at the back of it, preventing you from anything more than kneeling up.
What you may not have noticed is the second eye with shackles at the front. It's for your hands, and will prevent either of them ever reaching your clit or arse once you're locked in them, but your hands will still be free to help you suck cock.