A gay slave pleases his master

SENARIO : A slave is on his knees on the floor wearing a jockstrap and a big spiked collar that almost suffocates him. His master joins him and sticks his foot into his butt. He presses it stronger and stronger to tickle his anus and make the slut on the floor get a hard-on. He starts moaning with pleasure but the master is not here to make him feel good so he spanks his bare butt that will leave marks on the twink