I practically sweat just thinking about exercising. I didn't used to be that way, but the more I worked out, the quicker and more my body sweated.
One time I got out of a TKD session, walked out of the front door of the studio, stepped off the sidewalk into the parking lot, removed my T shirt and wrung probably about a half cup of sweat out of the shirt. Yeah, it was pretty gross.
I can sweat even when properly dressed for riding at -20*F. I get to work sweaty and cold. My body sweats when the core temp elevates even if my skin is way below normal temp.
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Work: the 8 hours that separates bike rides.