Cozy in the Jacuzzi (Note: this is potentially dangerous and not recommended)
Get in a Jacuzzi, fill it up with water, and turn it on. Then put your dick right in front of one of the water jets. It gets caught in the suction, and it's one of the best orgasms I've ever had.
Warm jets
Get in a jacuzzi (jetted tub) and just place your hard dick against one of the jets -- not your the cock head, just the underside of your dick. It may take a while to come, but it's well worth the wait.
Spa
If you have a spa bath, get your spa going and lube yourself and make yourself really hard. Now press your cock into the jets of the spa. With the great sensation you probably won't feel the orgasm, but the lead-up is still fantastically indulging.
Water works
Wait till everyone is out of the house and turn on the spa. Fill the spa up with water and then turn the jets on and get your dick hard from the jets. Then butt your asshole up against one of the jets and aim another jet on your dick, and then just pump away at your dick and you'll have the best orgasm ever.
