I too am having this strange wet, warm sensation on my inner left thigh. It's been going on for the last month or so.
It will happen somtimes only a few times a day or as much as 3 or 4 times an hour and lasts only few seconds.
As best as I can determine it doesn't happen while I'm sleeping.
SO....I did some checking and as many have already mentioned, this symptom can sometimes mean a potential blood clot.