It was a perfect beach day and a welcome change after such a crude winter. My best friend was their with his girlfriend and two other girls that went along with us. We layed our towells and distance away from some girls that were sun bathing, so we wouldn't bother them. My girlfriend was swimming with one of the girls and I was standing talking to my friend. His girlfriend and this other girl were sitting down besides him. This girl came back from her swim, sat down and mentioned how great the water was. I had a pare off baggy surffers trunks with an elastic band around the waist. My girlfriend's favorite joke was to tugg at my pants threatening to pull them down, but because I always wore a belt it never went ferther than that. She was sneaking up behind me to do just that. She din't know I had forgoten to tie the strings on my trunks and gave them a hard tugg and sudently I was naked in front of everyone on the beach with my trunks around my feet. She was the first to be surprised at what just happened and the rest of them were just broke out in laughfter looking at my nudity. I pulled them up as fast as I could and sat down dying of embarrassement. Those girls sitting by us couldn't stop laughfing about it, while my girlfriend was telling me how sorry she was. It was so embarrassing that after that day, every embarrassing thing that had happend to me before, seemed like unimportant.