mh57's blog post - "Dogging" in the park

If you don't know what "dogging" is, let me tell you. It's when one goes to a public place like a park or some side road to have sex with random strangers. It's very popular in England and is where the term "dogging" came from.
Some dogging includes actual intercourse, but mostly the woman will give BJ's or jack off the guy on her tits, face or belly while the others wait their turn. I have seen many pics of this but have never been to a real "dogging".
Reason why I bring this subject up is this. Last night I found out for the first time I lady friend of mine went for a walk to a park near her home. A total stranger walked up to her from behind and told her "nice ass" as he passed her. To that comment, she said "thank you!"
She said the man then turned around towards her, grab her face and kissed her fully on the mouth. She returned the kiss. He lead her into the woods, they sripped naked, sucked each other, and finally fucked until they both came!
Now, at first, I thought she was just trying to get me turned on since she knows I love sex stories. To my surprise, she told me it happened for real, not bullshit a few years ago!
I have never known of anyone that did that on a whim, no prep, no introduction, no drugs, no money spent, no names exchanged, went straight for the kiss and fucking in a matter of minutes!! wow, it really set me back. I would have bet my right leg she would never fuck a complete stranger in the park!!!
My question to you is this:
Have you ever had something like this or similar happen to you or someone you know? Details, please!!