I forgot to mention ...
I was out mountain biking 'on the tops' a few years back, climbing a bridleway to the summit of a ridge. As I got up there I spotted a couple ahead of me locked in a passionate embrace. They were rather engrossed in what they were doing and did not notice my approach. I coughed discretely and they pulled apart, looking flushed. I saw the man's face first - he was one of my neighbours. I then looked at the woman, who looked remarkably unlike his wife ...