I think it's something to do with the western Christianity approach that makes sex dirty. In Asia, I've been told by both women and men that it is a body function that needs release at times. African women are also different but their culture almost expects their men to go with many, or even take when they want it.

Jealousy is created by our narrow-mindedness and that also makes it worse.

Humanity also seems to be seen as a weakness in some in the USA.