血管扩张的

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.

在活动中，部和颈部的肌肉通常收缩，而高潮时血高。这些情况导致大脑中的血管张，在学术上这种情况被称为“交”。