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Pain triggers the release of endorphins. (This is also what happens during a "runner's high," and when athletes "play through the pain.") It's possible that the woman finds sex painful, but not painful enough to release the endorphins, or that she simply enjoys the endorphin "high."

In any case, remember that the human mouth can carry a lot of germs, so bite, but try not to break the skin, and be sure to clean the wound off if you do break the skin!

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13y ago

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