you can also add blush to that list. They are in the presence of a woman that they KNOW they wouldn't approach under normal circumstances (well except for Zach he seems to think he's god's gift)
The kind of excitment that would cause would also include sweaty palms, red hot blush and stammering, broken sentences. Add to that, alcohol, being tired (the sun saps your energy), sunburn and the heat of compitition.
Roseacea? it didnt take long for speculation to make the leap to a medical condition. The FORT seems to be over run with medical specialists.