coital

post-coital contraception.

交避孕。

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.

动中，头部和颈部的肌肉通常会收缩，而高潮时血压会增高。这些情况会导致大脑中的血管扩张，学术上这种情况被称为“交头痛”。