I wrote a guest post for the Noob Dad. An excerpt:
Lesson 3: Trick the Poop Gods. Toddlers, much like grandparents, do not control their own bowel movements. Instead they’re determined by the Greek or Roman, I forget, god of poop. What’s his name? Always skips my mind. Oh yeah, Satan! Satan waits until you’re about to head out somewhere before giving your child’s lower intestine the go-ahead to start filling the diaper with stinking waste. The goal of Satan is obviously to trap you at Costco or Barnes & Noble story time with a putrid load that somehow doubles your toddler’s weight, rendering you a Keystone Kops-like mess of madcap 1920s silent comedy as you grab Luke by the scruff of his neck (or ankle) with one hand into the bathroom while hauling the crying post-baby in the other. Once inside you’ll have to use a spare elbow or knee to tae kwon do open the ancient changing table that was installed in the 1970s as a token nod to the women’s lib movement but never intended for actual use. Then you will change Emma’s diaper with one hand and half an eye as you unsuccessfully verbally warn Luke not to pick up the urinal cake with both hands.
To avoid this situation, simply say you’re going to take the kids somewhere, wait until Satan has you on record, and then pull a fast one on him and say “Tricked ya, fool! We’re not going any damn where!” And then call up Sesame Street from Comcast On Demand for like the fifth time that day. Once Emma has finally been tricked into pooping, you can be on your way.