On the beach yesterday, I watched a very pretty girl of about twenty undress and get into her little bikini. She worked underneath a towel so as not to let me see anything. Wow, she looked so lovely in her bikini! It was black with little tie sides and not very much of it. Shortly after, she walked off along the beach leaving her clothes and bag behind. I moved a little closer and could see that there was a pretty black lace thong with her things. When I was sure there was nobody looking, I took it and went back into the sand dunes where I tried it on, pleasured myself, and returned it. I had to leave the beach before she came back because with the thong being black, she would know for sure what I had done. Now I canít stop thinking about it and I wish I had taken it with me.