Chastity Blowjob Tease (strap-on POV)

My sub is strapped to a chair, blindfolded, wrists cuffed overhead. His real cock is locked up as always, so I’ve put a strap-on dildo over his cage to give myself something to suck. I get on my knees and start slobbering over the dildo, performing a wet, messy BJ right above his caged penis. He hears me gag and spit, and I even dribble saliva onto his locked cock. He’s going insane with desire, but all he gets is the sound and mess – no release for him, just a spit-soaked chastity torment.