Hmm, isn't that toggle already in the game?
When I started it up, I got the question of whether to disable watersports or not. I of course kept it enabled, but to me it seems it's already implemented!
(Though an additional one in the menus to turn it on and off mid-game may be a good idea too)
Based on other games I've played with toggleable kinks, I would definetly either put it at the very start like it is now, or in a menu under settings. One or both of those places is the natural place to look for it IMO.
Either way, looking forward to next update, and I hope any health issues you've been having are a thing of the past!
Happy new year! =D