Well, was reading this thread before I registered
Adding my contribution:
1) My gf sucked me in the plane when we went to Europe.
2) Fucked many time in the sauna of the condo.
3) Got blowjob at the pool and fucked at the kid playground
4) She also liked to make me hard when we are at the pool or outside and then see how i do to hide my third leg.
5) In the car.
6) Not really in public but other people can see: we fuck on the balcony and also many time in the living room with the light on and windows opened
With another one
1) Fingered in a public park during daytime
2) Fingered and sucked in a train in Europe (one of the most exciting experience of my life). She was damn wet, once the train arrived in the city, she kept touching my dick and jump on me as soon as I opened the door.
3) When we were students, during a party, we got both quite high, and she started kissing me before sliding her hand in my pant to handjob me. We were on the dancefloor, but it was quite dark and most of the people were completely drunk hahaha.
Fingered her back in the middle of the crowd.
4) We also used to go cycle in the countryside: if I was a good boy, she would come to suck me during our break.
well, I got many more stories, but that the one I remember the most