My own childhood, actually.

[ he doesn't laugh at the joke, not that he's laughed at any of archer's sarcasm so far. ]

My parents died when I was younger. Up until then, my world revolved around them and the city I grew up in. Imagining anything else, or even that something like that could even happen, was barely comprehensible to me at the time. From then on, it changed the way I looked at the world.