My World of All Boys

I am not sure how to describe it...but boys must be born with a sense of "grossness." How does my 3-year-old know this -- last night I was holding Adam, and Daniel was just a few feet away when he let a big one rip. As he chuckles, he says, "Mom, I tooted!" I thought he was about to say, "excuse me," but instead he took a few steps closer to me and said, "smell it, Mom!, smell it!!!" Groooosssssss....