Z is exclusively breastfed. He hasn't ever had anything else. Now, in my experience, the gas and poop of an exclusively breastfed baby isn't at all offensive in odor. But the gas this kid has?! Whew! Seriously, it's like toxic waste level of stink.
His daddy had the nickname of the "Green Fog" as a teenager due to his superpower of being able to empty out a gymnasium in a single fart. It appears that Z has inherited this trait. I'm soooooo excited. Not.