I had my first panty experience when a woman friend asked me to feed her small dog while she was away for the weekend. I went into her house with the key she gave me, took the dog for a walk and then came back. I needed to pee, so I walked through the bedroom to use her bathroom.
She wasn't the best housekeeper and I noticed a pair of panties by her bed and another on top of the hamper in the bathroom. As I was peeing I reached over and looked at the panties, then held them to my nose. They smelled of sweat and sex and a little pee. I got instantly hard and took them into the bedroom and got totally naked. I used a green satin pair to jack off with while I kept the white ones from the bathroom to my face.
When I came into the green ones I panicked and immediately went to the bathroom to try to get the cum off. I mostly, but not totally, succeeded.
The next day I was hard when I walked into her house. The dog was eager to walk, but I was so turned on I rummaged through the hamper and found two more pairs, then spent a half hour on her bed and cummed into one pair. That pair I just buried back in the hamper, cum and all. It was my best masturbation weekend ever...and I never looked at Joanie the same again.