Since I am a professional (and work in a legal department) my Mistress and I have a limit during play as to where I can be whipped depending on the outfit I am wearing tomorrow (either to work or non-BDSM socially). I don't want to have to make any awkward explanations.
If it is going to be a couple of days before I'm back in the office or public we 'stretch' the boundaries.
But I would NEVER put up with any type of play that would leave a permanent mark on my body. I'm young (43) and don't know where my life is going. Having sports damage (and I do) or something that happened while working with the horses (got that too) is not only easily explainable it is socially acceptable to almost everyone. Having a brand on my hip isn't.
And THAT subs is why you not only have and stick to your limits you ONLY play with a Dominant you can trust. An "Opps" because the Dominant either loses control or doesn't respect your limits is not something that can ever be taken back. And if they don't like that tell them to play with someone else. We are actually in control, we draw the boundaries, we are lending them our bodies for their (as well as our) pleasure and a good Dominant respects that and stays inside of the limits or discusses going outside of them BEFORE it happens.
Jerks\Bullies\abusers don't.
kisses
willowfall