Spank them.
Spanking can be hot. That being said, it’s best not to give a whop out of nowhere that will just startle your partner and kill the moment. Next time you’re having that kind of passionate, animalistic sex, give them a light smack on the butt cheek with an open palm. If they seem into it, you can spank them a little harder. Studies have shown that arousal raises our pain threshold, so get after it!