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People can text each other.
Phones, computers-anything where people can talk to each other.
They lie there doing their cellphone thing.
They wrote to each other by mail.
They wrote to each other or spoke to each other mainly in latin or greek. In those days there were no computers or mobile phones.
Yes! Phones are meant for talking with each other, and think phones are cool! Trust me, I just bought a phone for my kids and they love it!
they call each other on their cell phones
Actually they do. The talk to each other using solar-phones instead of cell-phones. They have quite regular conversations too.
they help us keep in touch with each other
That is a personal matter for each individual to decide
a social interaction
That's how IbabyPhones are made!