Decayed teeth can cause varying levels of pain, with some individuals reporting minimal discomfort when teeth are decayed but experiencing more pain after fillings by less skilled dentists. Root canals can lead to intermittent pain prior to the procedure, but once completed, those teeth typically do not feel anything. Many participants emphasize the importance of addressing decay promptly to avoid pain. There is a humorous suggestion that having multiple decayed teeth at the same level might mitigate individual pain experiences. Overall, dental pain experiences differ significantly among individuals, often depending on treatment quality and timing.