Heh, my boyfriend found out all of this the hard way. When he handed me the key he expected it would be weeks before I let him out again - but he never suspected it would be months. Or years. But his behavior only improved the longer I kept him in chastity, as did his foreplay. And he was nothing but foreplay. He cooked, he cleaned, he did all the chores, he brought me to screaming orgasms every night... just like you will. And when it got to be so long between orgasms, he did other things. He begged. He humiliated himself. He dressed up like a sissy girl for me, punished himself until he passed out, let me take another lover and watched as I had sex right in front of him. He cleaned up afterwards. He whored out his orifices. He denigrated and punished himself until he was scarcely a person anymore.
Just like you will.