Wow, very similar to the OP for me.

I was 13, stayed home from school one day, and my mother was going out shopping and at the last minute decided to not wear pantyhose. She had taken them off and tossed them on the floor in her bedroom, and then went on her way. I had always had a fetish for nylons, although I really didn't know what it meant at the time. Anyway, I picked them up, gently slid them on, and all I remember was that tingly sensation that still drives me nuts some 35 years later. I wore them for about 15 minutes, then couldn't hold back any longer, and did what most 13 yr old boys do when turned on.

I often wonder if I had not stayed home that day, and those circumstances not presented themselves as they did, would I ever have tried on my first pair of pantyhose that led me down this road? I'm almost certain I would have eventually, but you never know for sure!