Coed fitting rooms are a naturally erotic place, just a little curtain or door with gaps or slats keeping your nude body from the view or strangers! I had a girl outside my door pacing back and forth, I could clearly see her down through the slats and could see her feet under the door. She certainly would have been able to see my boxers on the floor and I sprang such a hardon hoping she had some angle to seeing me through the door 3 feet away. Really wish I had your curtain!