@[url=https://mastodon.social/users/whitequark]✧✦✶✷Catherine✷✶✦✧[/url] There's a paper using MRI for that: Magnetic resonance imaging of male and female genitals during coitus and female sexual arousal [url=https://www.bmj.com/content/319/7225/1596]https://www.bmj.com/content/319/7225/1596[/url]