Pro's: freedom to explore things you want to do before you are settled down, No bed or cover hog, and no one to please but yourself.
Con's: the lack of a bond, the lack of meaningfulness in a relationship, and feeling alone.
If you are single, just have fun with it and go where it takes you. I have not been single since I was 17, but there are things that I wish I would have done before meeting my SO. I would love to have two men at the same time, but that is never going to happen with my current partner. I would have loved to play around with many other people instead of the monogamous relationship I have been in since I was 17. That did not allow for me to do many things and I regret not taking the chances when they were in front of me. Go wild and be safe, do what you want to do and one day you will meet someone special.