We are very into this indeed,I love being Dom on my OH anyway but Watersports takes the relationship to another level in terms of trust and closeness.We are both "active" givers if you like,depending on the mood.
I deliberately drink loads of water well ahead of time,and have even ordered him into the shower as he walks in the house from work.We always shower up straight away after,and have been known to have 3 or 4 sessions in a day(Plenty of towels)
There is something very liberating about the whole experience,but the most exciting aspects are, firstly,I am breaking the rules that were ingrained in me as a child,(secondly,it's the humiliation factor,I love seeing my OH at my feet all soaked and bedraggled,Thirdly the impact of the warmth is most intimate and exciting at the same time.
There is an element of this acivity that has nothing to do with sex
My suggestions for novices are,
Drink loads ahead of time,
Act out your fantasy!
Have plenty of towels handy
Clean up quickly after in shower or bath,this is a great way to have a soap fest cleaning each other!!
Have a safe word in case it's not your thing.
Be prepared for a dissapointment,the reality may not live up to your expectations.
Enjoy