Women, if you were hesitant about keeping him in chastity because you don’t want to give up sex then this might be the solution. He still uses his own penis to have sex with you - yet he doesn’t feel it, doesn’t cum too soon, and can last as a long and hard as you want - all without any risk of him having an orgasm! Once you’ve cum, just lock him back up in his chastity device. You’re really doing him a favor by not letting him have any pussy, though he might whine a bit about it.
Apply plenty of numbing cream to his penis before putting it into the sheath, just to make sure there’s no risk of him squirting and ruining your fun.
The best part of this is that he’ll have the psychological factor of seeing and knowing that he’s inside you - yet be totally unable to experience the pleasure and feeling that he’d usually have. It will actually help him accept his life in chastity to make use of him in this way, because in all senses it reduces his cock to nothing more than a dildo!