a boy thing?

I don't know if this is a boy thing or what, but K has become obsessed with dog poop. yes- i know has gross that sounds, how do you think i feel?
We have lucy, who for 5 years has been the queen of our back yard, and we have never had to worry about the mess. but with L's dog coming over during the week and since K has gotten big enough to play in the back yard, it is a big mess indeed. it gets pretty overwhelming at times when the kids want to go out to play, and it is EVERWHERE!
So, the other day, S was on poop patrol because we all wanted to go out in the back yard to play. he told K he needed to go get the poop scooping shovel from the garage to clean up the mess before we could play.
we though nothing about it until we got back to the back yard with the shovel and K was standing there with a piece of poop in his hand, saying,"poop,daddy,poop!"
Luckily(if this is actually something you could call lucky), it was hard and not soft! sorry for the details, but he was SO proud of himself.
he had no idea how totally gross this was and could not figure out why we completely flipped out. he just thought he was helping out daddy! now he combes through the yard, front and back, letting us know where all the dog poop is!
K: 'poop, mommy, poop!'
me: 'okay Kyle, thats great, just DON'T touch it!'