Marking your dad

I've recently become convinced that babies are born with instinctive urge to mark their dads. Similar to a dog marking his territory except babies have more than just pee at their disposal (although Collin makes good use of that technique). If they are really lucky they can mark us with leaky diaper, but their main tool is milk. They have a good supply of it and don't mind using a little for dad-marking. It doesn't matter what I'm wearing, what Collin is wearing or what protective measures I put in place. I can wrap him up like a burrito and cover myself with a blanket and he WILL figure out a way to get spit up on me. Sour milk stinks and possibly the only thing that smells worse is sour milk that has been thrown up. After just a couple hours of Collin time, he leaves absolutely no doubt that should I somehow end up holding another baby, there will be no question who this dad belongs to. I think I need a shower.