血管收缩的

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.

在性活，和颈的肌肉通常会收缩，而性高潮时血压会增高。这些情况会导致大脑的血管张，在学术上这种情况被称为“性交性痛”。