Soo much butt sweat, help?

I’m sorry if this is an odd topic. But my entire life I have struggled it’s my butt being the first thing to sweat, like the crack. And it wasn’t so bad while I lived in a colder climate, now that I’ve moved to a very humid and tropical climate i need help. After being outside for anything over 20 minutes I have a wet spot on my shorts from where it’s very obvious I either peed or have been sweating. Anyone else have this issue? And know a fix?

Thank you!