Apparently it isn't sleep that begets sleep. Apparently it is a whole day of skipped naps.
Last night the baby slept from 7:30pm to 4:30am. It would have been wonderful had we not woken up at 2am waiting for him to start crying. Since I was missing my own oxytocin hit, I was awake until 3:30am and then finally fell asleep again.
Then an hour later, the baby remembered us.