Love your post and love that you are both now into watersports.  I had fantasized about peeing for a long long time and finally got the chance to experience it, as a giver to my partner, a few years ago.  She loves golden showers and takes every drop.  After a few more sessions together she suggested she pee on me - on my cock - as she straddled over me.  I loved that warm wet flow on my cock and she loved then going down on my wet cock and giving me a fantastic BBBJ.  But the ultimate "new experience" for me was when she suggested that I taste her pee, have her pee in my mouth, just a little for the first time.  I was super excited but also very nervous that I would not like it, would spit it out, would turn her off.  But I agreed, she straddled my face and put her stream into my mouth, over my face, just enough for me to "get a taste of it".  And I loved it.  Her pee tasted sweet and salty and warm and wonderful.  We now add mutual golden showers to our sessions together.  And I am going to surprise her at our next session - I had two wine glasses engraved with "Golden Shower" on them and we will use them filled to the top with each other's pee and toast the next wonderful step in our fun together!

when I showed up for an appointment with a regular, and she was half in the bag.   She apologized and said the reason was that she had to down a six pack of beer for her last client because he wanted a golden shower.   I had no idea what that even was, and when she told me, I was a bit unnerved.

 
But, the thought swirled around my brain and the next time I saw her I requested a golden shower.  At first she pissed on my stomach and chest, but by the end I was lapping the stuff up, and loved it.

 
Now I do it with several gals, both give and receive.

 
I've had similar experience with BD/SM also.

So my first little taste of "kink" was a few years ago and my partner wanted to blindfold me, which didn't sound too intense but boy oh boy, was it! Every touch, every kiss felt 10x more intense because I was unable to predict it. It was like being introduced to my own body through his touch, it was incredible. When you don't know what is coming next, it makes everything that much more exciting. As women we tend to get distracted in bed, but when I was blindfolded, I was a slave to his touch and I loved it. I loved that he Loved it! It was my first introduction to being a submissive and I would do it again.