I have heard my downstairs neighbour lots of times having sex. She is an attractive girl in her mid-20's with a nice figure. We live in a small block of flats and, let's say, the building wasn't built with too much insulation. It doesn't happen these days as she appears to be more interested in her career, but before that she invite her boyfriend round for a night of Dinkins and sex. Up to a couple of years ago, I was regularly woken by her during the night at weekends. On a few occasions I just had to get up, as quiet as I could go down the communal stairs near to her door and sometimes I could hear lots of moaning and creaky bed springs!
On one occasion she must have left one of the internal doors open, because it almost seemed that I was only a couple of feet away. I often wondered what position they were in. Trying to hear anything they were saying, once she appeared to be saying "just there between the fanny and bumhole".
We have a few conversations from time to time and I am often thinking about her little sex secrets. Shame she is more than a generation younger than me!!