Oddly enough .... when I was about 10 yrs old I called at my friends house as arranged but there'd been a change of plans and he wasn't home ( no mobiles 50 yrs ago !) .. anyways there was no answer at the front door ... so I went around the back of the house and knocked on the back door .... no answer ... then I heard loud music playing so I went to the porch doors and looked into see my friend's dad doing 'press-ups' on the pretty blonde neighbour to a backdrop of American Pie !!!