Complex sentence: This story is narrated by a man who wakes up after a three day ride, and, unusually, recalls what has taken place: a random sexual encounter with a woman, also being ridden at the time.
Split into simpler sentences: This story is narrated by a man who wakes up after a three day ride. Unusually, he recalls what has taken place: a random sexual encounter with a woman, also being ridden at the time.