I had my first real orgasm in the bath, thanks to a shower head that fitted on the taps. I'd just washed my hair with Vosene. Then I got into wanking a lot, and somehow must have laid down on a waterproof jacket to do it (wtF???!!!! 😂)
Anyway, I developed a thing about the coaltar smell coupled with the feeling of the w-proof under me, and that combo became a kink for me.
What are yours?