Naps and poo

I'm trying to figure out what the link is between naptime and poo time. For some reason lately whenever I put Babes down for a nap when she wakes up she has left me a present in her diaper. Which is not a problem except that she likes to cuddle for a little while after she wakes up so I have to sit with her all cuddled up smelling like serious stinky poo. Is it that she's all relaxed and it is therefore easier for her to get business done, or should I be waiting for her to make her presents before she goes down for a nap (except that I never know which nap is the surprise nap). Case in point, she has just woken up, is sitting on my lap very stinky, yet all cuddled up while I write this. I think she might be ready to get a new diaper. P!U!