This Is Your Brain on 1인샵
https://www.evernote.com/shard/s688/sh/55d5954b-1523-46ad-89a0-0a4853580a62/3b6a3cfa0af8a3b5ebf4657c8b660639
Generally the most appealing for men sort of threesome is with two Gals. Some Gentlemen involve their girlfriend or wives in threesome pursuits, the Other folks dont.