Frivolous fun time folks!
We have all done it so we don't need the salacious details but where we have done it and what the circumstances were is what this is all about. Everyone has probably done it in a car but was the car moving and who was driving at the time? Sand dunes? Camping? Jacuzzi? B&B? Ship? Plane? Train?
So what makes this thread worthwhile? Every location has it's own challenges. And sometimes the outcome is not quite what was expected.
As a horny teenager I was bringing my date home very late at night after an Easter BBQ. Since we were on my motorbike she indicated that we should take the back alley behind her house so as not to wake the dogs at her parent's house. We were making out and she suggested that we go into her father's workshop.
Now that was the location that matters for this tale. During the subsequent randy act of adolescent lovemaking things got heated and it was at that point that I kicked the bucket!

Yes, a galvanized steel pail on a concrete floor makes a lot of noise and yes, it did wake the dogs too!
But it is only because of that location that I can honestly claim to have kicked the bucket while making love and lived to tell the tale!
So please share the locations where have you enjoyed your own intimate encounters of the unexpected kind.