They are completely fictional.
Of course this did not happen.
For those of us old enough to remember this:
Dear Penthouse:
I know you'll never believe this story, but it is absolutely true.
So, an incredibly well-endowed woman moved next door to me and my wife, and she decided to run around topless in her backyard. We greeted her politely and suddenly my wife suggested that we have a threesome....
Penthouse letters were essentially a perpetual bouncy story. Things that would never actually happen but seem like fan fiction.