It's been a while since I used a hot tub but my JO bud and I would go to the local recreation center during high school and go in the hot tubs there. We'd turn the jets on and let the jets fuck our asses. We'd pull our trunks down just enough so we could get out assholes near the jets. We'd keep the trunks right below our ass so we could pull them back up quickly if anybody else got into the tub. We filled those hot tubs with a good amount of cum.

Also works great with the handheld shower massage on the underside of your cock... fantastic orgasms...

anyone try that method?

Yes, both the hot tub jets and the hand held shower feels great!Would be great to play with your buddies cock while our asses were getting a massage.

https://xhamster.com/videos/more-pool-jets-6601064

Great memories from my younger days just like this...

https://xhamster.com/videos/pool-jet-masterbation-to-orgasm-6716623

Gotta find me a pool...

And another good one...

https://xhamster.com/videos/swimming-pool-orgasm-6229125

And a final...

http://motherless.com/60D1137