Years ago and it was Christmas day a mate and I were out to avoid a 'family Christmas' and since we both had jobs that could have required us to work we just made our excuses and decided to do the day differently.
We went for a long run at the sea and eventually kicking off shoes but keeping shorts and vest on decided on a brief swim - northern hemisphere winter so we didn't stay in long. We got back to the car and needed to change. As we were both pretty wet, it was everything off, get dry and then dressed. Next thing was police sirens and blue lights, someone with a view of the car park from their house had called the cops and complained of two men mooning in the car park. I guess we had and probably in sync. Fortunately the cops just laughed and went on their way, both fit guys so maybe they could have joined us for a bit more running and swimming! It was a great Christmas - and there has never been another one quite like it.