In the annals of parenting there are guides, tips, and dirty tricks. This is definitely a dirty trick of the foulest sort.
ELLEN, in sweet, innocent, congested voice: "Could you check Olivia? I can't smell anything because of this cold!"
SCOTT: "Sure, no problem." Leans over to baby gumming a toy block sitting at the foot of the couch... *sniff* "Yup, she needs changing."
ELLEN, in completely clear normal voice: "HA-HA! You found it first! You have to change her!"
Women are evil. I'm only just beginning to realize the implications of having two in the house.