How can you substantiate such a broad claim? I'll answer for you: You can't, not even if you were King Swinger in the USA and knew every swinger in the country personally. All you can know from your own activities is your own sexual predilections.
Any proper scientific study of the swinger community would turn up much higher rates of deviant behavior in all areas of sexual conduct, including pedophilia. You are dreaming if you think otherwise.