My slave is not allowed to get hard

I let my Slave out of Chastity and teased him a little bit. First i tie him to the bed with his legs wide spread, so that he can't put them together. then i start teasing him bu he is not allowed to get Hard. Everytime, he does i severly beat his balls and dic with my riding crop, that he screams. but because of the dildo gag i can't hear him anyway. As i'm very sadistic it made me so horny that i had to ride his Face. Thats why i let him put on the dildo gag before i locked him away in a cabinet for hours. See how hard i come whie i beat his balls with my bare hand.