Six months ago, I hooked up with a new girlfriend. We have been very sexually active from the first night on. One night, after a good session in my car, she winked at me, reached over from the passenger seat and tucked her satin silver G-string into my pocket. Told me to find a good use for them. I knew exactly what she meant.
Now, until this moment, I had never even considered jerking-off with panties before. But I quickly began having second thoughts. By the time I'd dropped my girl off and got home, my penis and I were fully in support of the idea. I didn't waste any time in stripping naked and wrapping the silky material around my hard 6 1/2' meat. At that moment, I had a moment of clarity as to why men develop panty fetishes. The smooth silky fabric felt amazing on my cock. I began sliding it up and down as I recalled the fun we'd had earlier.
After a short time of pumping, I began feeling that familiar rush. I came with such vigour and ferocity, that the first two spurts shot clear through the satin G-string material and landed on my wrist. Wasn't long before the entire crotch was soaked with cum.
I enjoyed that experience so much that I had to indulge once again before returning it to my girlfriend the next day. She wasn't surprised to see the satin clogged with dried cum.