Before Miguel, Sandra’s sex life was rather vanilla. When they got together, he suggested swinging – and all that changed

• How do you do it? Share the story of your sex life, anonymously

I never thought, when I was a pregnant Catholic teenager, that I’d have this lifestyle, but my God, it’s fun

She can’t get enough of hearing about my hook-ups, and I can’t get enough of the fact that she can’t get enough