one of our memorable times was in an outdoor spa pool at a resort. although late, the pool was well lit, and in the middle of it all we were joined by another couple. we tried to appear to be just hugging, and prayed hard that the jets would not stop and reveal our nudity. our embarrassment subsided (and excitement increased) when we realised what the couple were doing, and saw their swimmers on the side of the pool, not far from ours. it seemed they nooticed the fun we were having and decided to join in.....

we have done the serious swinging/group thing behind closed doors, but doing it publicly, outdoors and spontaneously was something else!