Now that is a nice blade.
It is possible for a sub to writhe around without getting cut, depending on how sharp your knife is. I actually like to play with duller ones around the neck area, because they afford your partner a bit more give; you can slice them around a bit, and press the tip in ever so slightly, without having to worry (as much) about inadvertently causing major carnage.
Then again, ultra sharp is fun for different reasons. :)
It depends on the situation I guess.
I personally , prefer mine all shaving sharp, but with that said, the degree of control has to be higher.
If a sub was shall we say, "boistrous", then it becomes a very fine line indeed.
Smaller blades are sometimes preferable, IMO, because one can palm them if necessary to avoid a deeper than wanted cut. The bigger the blade, the bigger the risk, but then ..... isnt that part of the attraction?
Also too, some folk have to be acutely aware of the fact that they may lose some restraint when they become aroused.
I know, right? Poor Luna.
And while that is certainly part of the attraction, I like being able to do more.
I have experienced this marginal loss of onctrol, on both sides, which is another reason I like to play with duller blades. It is in those instances where modesty suddenly becomes critically important. :)