*TMI PIC* butt sweat or fluid?

My husband and I went for a walk today and I noticed my undies felt wet. When we got back they looked like this 😳 this is after I took my pad off, it was soaked. It’s 63°F and breezy here so I guess it could be butt sweat? I didn’t feel that hot though.

*edit* it didn’t smell like pee but I’m pretty darn hydrated so idk if I would be able to smell my pee 😬