If a guy tells me upfront he is dominant and likes to play rough (asking permission & setting guidelines) , I can get into the power play (Normally part of roleplay, which I really enjoy
....But if we do not discuss this scenerio first, then it can be a bad surprise- especially if I haven't mentally prepared for this type of play....Even besides teeth, it's very easy to gag (and throw up...gross I know!) while doing this!