It depends on how it's used and the attitude of the user I suppose. It's probably not something I would start a session off with unless maybe you were caged, but vibs are great for tease and denial or forced O. If you don't like it or are afraid it will make you leave an unwanted puddle, then communicate that to the Domme pre-session. Vibs also numb some people out and they request they not be used. I don't have an issue with that.
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