My girlfriend as of now has an interesting problem of sorts. We have had sex several times, and recently (the last two or three times) she has experienced a sudden dryness downstairs. She was a virgin when we got together and she's still getting accustomed to me, so wetness is pretty much essential for us to continue doing it (and I'm sure that it's much more comfortable to be a bit wet to take any cock anytime). Therefore, sudden dryness = sudden, incredible pain. She's come up with several explanations. One, which seems likely, is that she's simply tired. After all, the dryness usually doesn't creep around until she's had several orgasms and we've been going about 30-40 minutes. Another explanation was my car's AC, which one time was blowing directly on us as we did it. So here's my question is directed to the ladies of LPSG: Could it be that this dryness is because of fatigue or the air conditioning? And if so, is there a way to prevent it?