sweat?

I carried my phone to work in the front pocket of my shirt this morning. The screen on the phone was resting against my chest. I just took it out to put it on to charge and the screen was covered with a thin layer of moisture... What would that be? Sweat, presumably, but that would mean sweating through my shirt and creating an environment in my pocket so moist that the sweat started to condense on the screen. Could that happen? If so, that is some impressive sweating.