My answer to the topic "Are diapers a sexual turnon for anyone?" prompted me to start this topic, because plastic panties most definitely turn me on sexually. I became aware of my fascination with and my liking for soft vinyl plastic when I was a little kid in the 1940's and 1950's. Since no one in my family ever talked about incontinence or wearing diapers I didn't have the kind of exposure to them that lots of people do - that may be when I got hooked on plastic instead. I remember a booth outside the county fair that had all kinds of plastic items for sale; raincoats, aprons, shower curtains. My mother made herself an apron out of dark blue translucent plastic, and we had a shower curtain made of dark red plastic with big white stars on it.
But it wasn't until much later in my life that I found out that there was such a thing as plastic pants for adults. Instead I would scrounge any kind of plastic I could - from aprons, laundry bags, or whatever. I found some plastic bathroom window curtains and figured out that I could tie them into sort of a diaper, and those were actually my first plastic pants. I would wear them in bed, and had my first orgasm in them. Well, if I thought I was hooked before, that sealed the deal.
I always kept this fascination with plastic hidden from my family, and so I continued to keep it to myself after I got married. At first I thought that I'd lose my attraction for plastic now that I had a normal sexual outlet, but I soon realized that a fetish is a lifelong thing. Inevitably my wife found out about it, and although she never wanted anything to do with wearing plastic she eventually realized its importance to me, and tolerated it as long as I kept it out of her face.
I saw mail-order ads for adult plastic pants from time to time, but these weren't at all common or easy to see, and it wasn't until I got online in the 1990's that I discovered how easy it was to obtain adult-size plastic pants. Since then I've never been without plastic pants. In addition to them being a sexual turnon for me I discovered that they are a comfort item as well. I worked a lot of graveyard shifts, and discovered that it felt good to sleep in plastic panties when I was in bed by myself. Eventually I convinced my wife that not only could I sleep better in them, fall asleep more easily, and feel better waking up, but that this would help her to sleep better as a result. I've been sleeping in plastic pants now every night for eleven years.
I lost my wife two summers ago after being married more than fifty years, and since then I've worn plastic panties more than ever. It is really amazing that a bit of soft vinyl plastics and some elastic bands can provide so much pleasure. It certainly seems to me that I was meant to be a plastic lover.