Share 'Boys And Their Private Parts, How EARLY "IT" Starts!'

Ok, my son is only 3 and 1/2 years old, and to be honest, the first time he touched himself in the tub he was 3 MONTHS old! I knew I was in trouble then! But my question is...as a single mom who is very easy going and relaxed about things I am wondering if there is actually anything I "should" be doing in this situation, or if just letting it be is the right answer. Here is the story: My son us...