Here are some watersports ideas that I've speculated about. They are written with a toilet head cage in mind. They are organized in order of the number of people using the facility. Remember to play safely - a few kinds of diseases can be transferred with urine.

Solo

1. You tie your victim in position and leave him there for some long time, using him at will, just as as you would the porcelain equivalent.
2. You tie your victim in position and use him, then masturbate while he is still struggling to swallow your pee.
3. You use the toilet box, and mix some vinegar into the contents of the funnel. Piss and vinegar - Yumm!
4. You use the toilet box, and then follow it up with some spit.
5. You place a plug in the bottom of the funnel before using it. You remain seated, perhaps reading a magazine, while allowing your victim to contemplate his fate, before finally pulling the plug, getting up, and walking away.
6. You store up your pee for a day or two in a series of bottles. Once your victim is in position, you pour them relentlessly down the funnel. Your pee is cold, except for at the very end, because you finish up by using the funnel directly.
7. You make your victim cum. Then, you make sure it ends up in the funnel, before sitting on the toilet and rinsing it down his throat with your pee.

With a female friend

1. You use the toilet, while your friend sits on his belly and amuses herself with some CBT. When you are finished, you switch roles with her.

With a male friend

1. After intercourse, you both use the toilet, one right after the other.
2. You sit on the toilet, and place a piece of tubing between your legs for your partner to pee through. You both use the toilet at the same time.

Parties

1. You invite a number of your female friends over to your place, drink a lot of fluids, and see if you can make the toilet overflow.
2. You set up the toilet box at a party, and allow any number of men and women to sit on it and use it. No standing!
3. You set up the toilet box at a party. For the men, you set up a funnel around waist height that is piped into the toilet, so they can choose to pee while standing.
4. You keep the toilet box ready, and put a sign on the bathroom door that identifies your victim as the missing part. Users seek him out and request that he assume the position - either in private or in public.
5. You immobilize your victim in a toilet box located in the basement, and set up a second facility upstairs that is connected by tubing to the toilet box in the basement, thus allowing anonymous usage.

Spank me, please - if you'd like to go home.