My oldest boy is wearing the smallest size underwear I know of and my youngest boy is just about ready to start wearing underwear (in the same size). It seems to me like sharing the same set of underwear at this age (3.5 and 1.5) wouldn't be weird, but am I wrong? I plan to get some extra pairs so there's enough, but I just don't see the point of getting an extra set of underwear and keeping them separate when they're the same size and so young.
What do y'all do? If they do share, what age would you make a point of separating them? (assuming they stay about the same size)