I've seen this term bandied about in ads and such but I was curious as to what exactly this means, and how this would work in the real world especially since I've seen it numerous times in ads for online D/s.

If I'm understanding the term right - I just can't see in an online relationship having to email/text/IM a Dom/mefor permission to use the bathroom and have to wait around. In any kind of situation it just seems unhealthy to me to try and hold it for a significant amount of time - wouldn't this cause urinary tract infections or something?

I've heard of Dom/mes having their sub masturbate/edge every time they use the restroom but I'm pretty sure this is something different...