"Are they twins?"

For the record, it is Sunday, September 25, 2011,  and we got our first "Are they twins?" today.
They looked like this:

When I said they were just over a year apart, the Sam's cashier said, "They look just alike. Which one's older?"

That part shocked me even more than the twins question. I guess our Desmo is even more grown up than I thought. (Or Dexter is not as grown up as I thought?)