Is It Normal To Have A 6 Year Old Boy Being Caught With A Girl?

My six year old son was caught with another girl his age in the boys room comparing each other. Although, I don t believe any bad touching was done, my concern is whether or not this is normal. I am a male age 41 and everyone I have spoken to believes this is just a natural ocurance. My wife on the otherhand has an issue with it. Can you please help?