There was a music festival this past weekend, and my girlfriend could only come on Saturday, I got there on Friday. I camped in a big group of 25 people, most of which I had never met until then.
On the Friday night I went back to the tents around midnight to find our little site deserted (everyone still partying). Horny, and no girlfriend around, I went straight for the tent of a girl who had huge delicious tits. I couldn't find her dirty panties (had to be quick) so took a clean pair and headed straight for my tent! I immediately dropped my jeans and jerked off by covering my hard cock with her panties (which weren't g-string unfortunately). I came within two minutes from beong so horny and that feeling of how naughty this was! I didn't cum in them, would love to but didn't want her to be suspicious, so quickly returned them.
Only five minutes after that there was still no-one around so I went straight for another tent of a girl who was so cute and fuckable. Again only found her clean panties (again no g-string!) and jerked off with them in the same way, cumming quickly.
I love being naughty like this, and love my panty fetish!