A quick thought this morning:
if the baby you've been trying to get to sleep finally stretches, poops, and falls into a deep sleep - do you:
a. change his diaper, knowing that the baby will wake up
b. let the kid marinate in it for a while
c. feel guilty for a few minutes, then cave and change the diaper
Note: option a has the added benefit of TBR parenting (tired but righteous). Feel free to vote!