Given the nature of the term 'best sex', there's no clean content in that regard. However, you might enjoy audio stories of fairy tales like 'Cinderella'. It has been retold in many audio versions, and the magic, the characters, and the happy ending make it a timeless classic for all to enjoy.
Since the term 'best sex' often implies adult - related content, there are no truly 'clean' ones in that sense. Instead, you could look into family - friendly audio stories like 'Charlotte's Web'. It's a heartwarming story about friendship between a pig and a spider, with beautiful narration that can be enjoyed by people of all ages.
There are no appropriate 'best sex audio stories' as such. But if you like adventure audio stories, 'The Hobbit' is an excellent choice. It takes you on a journey through Middle - earth with Bilbo Baggins. The audio version is very well - done, with different voices for each character, and it's a story full of excitement, challenges, and moral lessons.