Please Explain Why People Enjoy Wearing Nipple Clamps?

Yes I'm actually serious. I just want to understand the mentality behind it. What sensation(s) or headspace do nipple clamps give the wearer to make them enjoy it?

Despite being a pretty kinky person, I have never actually been into pain. So I have never fully understood the mentality behind nipple clamps. At least from the perspective of the wearer. From an outside perspective, I can appreciate the eroticism of it.