I just got a haircut, so I wondered if that's what triggered this response. Nathan's commented a few mornings when he's seen all my hair sticking up, "Dad, you look wierd!" So I thought maybe, perhaps, he meant I didn't look like Einstein, with my short cropped hair. So I probed a little.
"Why don't I look like Frankenstein?"
"Frankenstein has flat hair. It's black. And he's green, and you're not." Nope, I guess he really meant Frankenstein!
Maybe I should have dropped it while I was ahead, but I responded. "You're right, I'm not like Frankenstein in any of those ways!"
"No, you look zery, zery, zery, zery, zery, zery, zery old!"
To me, old = wise and mature, so I took it as a compliment. I also took it as a compliment that I don't look like Frankenstein. I think.