Thanks to everyone for this great thread, which has vividly reminded me of my teens and a particular instance I had one summer's day
After school I delivered papers in my local area on weekday evenings and once a week collected the money for them from the homes I distributed to. On this particular occasion the door was opened by an attractive married lady I had got to know quite well, who was in her early 30s and had a trim yet curvy figure that I secretly admired. Very quickly my eyes were drawn down. I spotted the distinctive contrast between her plain dark coloured flared slacks and the white background with pink polka dotted knickers revealed as her flies were entirely open and seemed to gape widely. I immediately blushed and could feel myself going very red, but also hardening too. She acted quite naturally throughout and I continued to try and discreetly savour the view she was displaying. I still wonder to this day if it was deliberate, or an accident she realised about after I'd left.
