I have written about safewords before but a perspective i hadnt thought of is how sometimes a safeword can be relied on too much, to the point that it could cause a dominant not to monitor his submissive as vigilantly as he should be (mostly related to s/m) because he is relying on her to communicate to him via a safeword if something is wrong.
Personally we dont use a safeword, we did in the begininng but as the s/m became more intense the less one was needed which is odd i know you would think it would be the opposite but as things become more intense i get into subspace more easily and therin lies the problem of relying too much on a safeword.
When i get into deep subspace i am gone, i am in my own bubble, i can barely if at all register if he is saying anything to me let alone communicate myself, i am entirely absorbed by this intense feeling of calm and its when im probably at my most vunerable, he has fisted me before when i have been in subspace but i can honestly say i dont remember it, its hazy and if it wasnt for the fact i know he wouldnt decieve me i would be convinced it hadnt happened..thats how deep under i can get at times.
Relying soley on a safeword at these times could potentially be more of a safety risk because i am unable to register if something is wrong that should be, more importantly it requires that he is extremely vigilant in whats happening, constant checking in to ensure that all is how it should be.
Im not saying that having no safeword at all is the way to go, and there is nothing wrong with having one but i think its more important that due care and attention is paid to the submissives responses and the overall situation than relying on a word being utterred.