Dh and I have been laughing at the pfb thread. But in reverse (sort of), don't second born children get a raw deal? I offer you example A:
On my return from the school run dd was attempting to snatch the snack I had purchased from my hand. "Wow, she's enthusiastic," I say to dh. "What did she have for breakfast?"
Cue stricken look, silence then, "Fuck!!!"
No firstborn ever missed breakfast because it's parents forgot! 