1.Head and neck muscles often tighten during sexual activity, and blood pressure can increase at orgasm, causing blood vessels in the brain to dilate, a condition technically named coital cephalgia.

1.中，头部和颈部的肌肉通常会收缩，而高潮血压会增高。这些情况会导致大脑中的血管，学术上这种情况被称为“<span class="key">交头痛”。