My wife wants to swing but I don't--what to do?

Been married ten years and she is a flirt but has never cheated that I know of. But she has repeated said she wants to try swinging. She even placed a couple ads on Craiglist but says she only ever talked to guys. She says she wants to explore, but at the same time doesn't want to me to do anything.And it's feast or famine at our house. We either have lots of or none at all. I don't know what to do.