Bathing for Klingons and Positronic androids
Klingons take showers, but they sometimes have to bathe in a wormy ooze. They have this species of worms that helps them exfoliate their skin so kind of like a symbiotic relationship of sorts and they kind of have to stay in that ooze for alteast to 30 minutes to an hour. Maybe more. The smell is a combination of Klingon roses and some bad smell that the worms give off. They have a flehmen response to the smell as well so if any non Klingon sees all this its best to be on their way because non klingons can't get them out of that ooze for any reason.
Any positronic Android has to bathe in some really disgusting oozey fluid that's good for their bodies and also their bioplasts. It also helps to exfoliate their skin. This all stems from 2 types of silkweed flower which are both a weird combination of a rose like pod like flower and mushrooms which exists as a symbiotic relationship. There are also insects, called Alagos Aphid. This insect is naturally drawn to 2 of the silkweed flowers, it also produces a special type of saliva and feces which mixes with the oil. All in all if the fluid has not been changed or the ribosome or whatever, the smell of the fluid will elicit a strong arousal out of Data or any other positronic Android. Once when Data was on an away team to find more of these plants, one of the ensigns poked it and Data was struggling to not be aroused.
Also he can drink this oozy fluid, but he kinda has to poop it out and it's not a pretty sight. Also taking a shower with this stuff is not easy to get off so it takes Data an hour to get the gunk off his body.