I once read of a great game which one can play with a sub although I have not played it for years now.
Select a day when there is a full horse racing fixture covered on live TV. Have your slave select the horse he believes will win each race. (You might want to remove the odds from the list of runners so that the slave does not always pick the favourite – but, to be honest, it does not really matter if he does.) Note each horse and the jockey’s colours for each horse. Set up a footstall facing the TV. Secure your slave bent face down, on hands and knees, over the footstall. Buckle a bit gag into his mouth. Sit behind your slave. You may choose to wear tight jodhpurs, riding boots and a silk blouse. Each live race then goes as follows.
You watch the horse your slave selected for the race. If it is leading the field, your slave just gets the odd stroke of the crop to keep him in the lead. If he is not leading, and particularly when you get to the last few furlongs of the race, the cropping becomes vigorous to try to motivate your slave/horse to take the lead. If your slave/horse does not win the race, he is then punished for laziness, in the gap before the next race. Should he come at the back of the runners the punishment has to be considerable! Should your slave/horse win a race, he can be stroked and praised, (stroked ‘between the legs’ may be best). Each race follows this protocol.
As it is a day at the races, I find a few glasses of champagne help me get fully into the race-day mindset, as the event progresses.