It's somewhat unlikely to lose control, is just you training your brain to go more often and for it not to freak out when your not near a toilet or still clothed.
The most that will happen is more frequent and more urgent voids.
Just remember when you become to comfortable letting go, you'll end up having accidents.
24/7 loses it's flare after awhile. Especially if it's sexual for you.
It's not unhealthy to not hold it in. It's actually healthier to void more often. You rid your body of wastes more often. Reducing the chance of prostate, kidney, and liver problems. You're less likely to get kidney stones. Please don't assume something is unhealthy or healthy if you don't know the facts.
However, performing body modifications, usage of catheters IS dangerous. You can have serious medical complications.
We all fantasize art one time or another about having to wear diapers because you have no control. When it comes down to it, you'll have to wear diapers in some of the most awkward situations whether you like it out not. I do have these fantasies and I have tried temporary solutions, having said that, I wouldn't want to be permanently incontinent.