"Are they twins?"

People often stop to comment on the boys at the grocery store or other places, and lots of times they ask, "Are they twins?" Since Abe is a full head taller than Seb, I'm not sure how this could work, but I guess it's hard to tell when they're both sitting down. Anyway, the same could be wondered about Sam and Abe, apparently. (And Sebby didn't want to be left out of the picture, so there he is.)