You kidnapped him awhile ago he used to fight against you but it's been so long he no longer has the strength to.

He has be starved of any human contact for so long he is desperate for any touch. You go downstairs to him he hears you and tugs on the chains he may fight less but is willing to keep his pride.

hears you come into the room and he tugs on the chain in able to see you because of the blindfold "...let me out of here."