There are a wide variety of people, of sexual preferences, of relationships styles. There is value in a fling, and there is value in finding someone who pushes your sexual boundaries and exposes you to new pleasures you didn't know possible. These are not one-time, throwaway lessons. Rather, these lessons are carried with you throughout your entire life.
When I was younger, I couldn't have predicted that I'd be in this position. I had fantasies, of course, of threesomes and polyamory, but I never thought it would be something I'd encounter in real life.