I have a few as well.
At a party at a huge house, walking away from the party with my girlfriend to a different house's open garage, fucking her in the ass up the neighbours car, then coming in her mouth.
At a different party, this girl just takes my hand and pulls me outside to the garden on a chair, takes my cock and her tits out, and starts sucking my cock. We find a room upstairs, and fuck till morn.
With my current girlfriend, she gave me a handjob in the rain under a raincoat by the biggest stage on a festival, during Robbie Williams.
On a bus trip to Paris, during a stop at a rest area, we fucked in some bushes - partially hidden.
At a party I hosted, under a blanket, my girlfriend gave me a handjob while we were all watching a movie. Nobody noticed.
Fucking at a vacation while her 16-year-old sister was in the top bunk, she was able to see us in the mirror if she tilted her head. She even complained about the movements!
I regularly jerk off at various places, in my car at parking lots at a place where a lot of cute girls pass by...