I read Debbies contribution and thought I would have a go. I wore a really short skirt and my school panties to the beach. (I live in North Austalia so its warm all year round.)
I got the beach and squatted down and rubbed myself through my panties and when I couldn't stand it any more I peed. The orgasm was shattering. I have never experienced anything so intense. Thanks Debbie, it really does work.
(As I wrote this, I was sitting on a towel and slowly letting it go in my panties, I have just touched my clit and made myself cum)