Families are external hard drives?

Part of my job is to do community outreach, which essentially means I hand out pamphlets and talk to people at events.

I find it really interesting how I repeatedly come across the same situation: two people (married or in a relationship I assume) walk by together. Both stop to listen to my sphiel, but only one really listens and takes my pamphlets. And often, immediately afterwards, I can hear the other one asking the one that listened what I was talking about.

Maybe it's because of my habit of only focusing on one pair of eyes when I talk....but I think most likely it's because we treat our other family members as external hard drives. (I read this somewhere before...I just don't remember where).

Because we live so close together, we simply have to ask certain members of the family about certain things they are good at remembering (or doing) instead of learning it ourselves. Therefore we gain an extended memory; our skill set/memory just doubled because one more person is in our family.

It's quite obvious when you consider parents always asking their kids how to use the mostly simplest of technology again and again. It's not that they can't learn, it's just that they don't have to.

This division of labour in the family might be a huge advantage evoluntionary wise....?