I'm staying the summer at my BIL's house and nobody but me uses the hot tub (and I use it only when they're gone). The tub is completely private so I have no problem removing my swim trunks and basking in the joy of all those jets. Their hot tub also has a stream of water maybe 10" wide that functions kinda like a fountain. Though most of the jets feel wonderful and get me hard as a rock, it's this fountain that has built me up to several incredible orgasms.
My question is: what hot tub element: water jet, fountain, waterfall, etc. do you enjoy using to get off with?