Here is a quick background… We just bought a hot tub (spa) and usually use it in the evenings before bed. We had been on an honor-system break from real lock-up—meaning no masturbation—and my keyholder decided we were returning to actual locking.
So, about day 3 of being locked up again, we are sitting in the hot tub (yes, with me locked) and she casually glances at me and says… “Well I suppose there is no point in unlocking you for cleaning anymore since you soak in chlorinated water every few days” … then adds … “we should have bought a hot tub years ago” …
That remark was a home run for me, hitting all three marks (memorable / exciting / scary) at once! Naturally, it was followed by an evening where she had two wonderful orgasms while I stayed locked and dripping… what a lucky guy I am!