I was 15, and most of my friends stopped trick or treating, but I just couldn't stop, it was so fun!
The only problem was I didn't have a costume, so I just tied on a cut up sheet and called myself a ghost. It was a freezing cold night, but i didn't wear anything under my sheet because I just enjoy that feeling (..and I'm an idiot sometimes)...
Well, I walked about a mile and a half from my house, and winds were picking up. I went to the house that I wanted to be my last before I would head back. My school crush opened the door. I was excited to see her, so i took of my mask, leaving just the sheet.
"Derek!?" she said? "Whatsup! Aren't you a little old to be trick or treating?".
"Of course not!" I said!
At that point, because it was actually only the mask that was really holding up the sheet, the sheet fell, leaving me butt naked in front of her, my cold little penis dangling for her to see, and a gust of wind came and blew my costume into the distance! I was mortified.
"Well, Derek, you do look small enough to be trick or treating, now that I see you!" she said.
I turned bright red, got an erection, dropped my candy, and ran the entire mile and a half home, for all the neighborhood to see, my sprint took about half an hour, nude all the way. And worst of all I had to face my crush at school for the rest of the year!