Also some other truths which have occurred to me:
If someone sends a card to your name, DP's name "and kids", or "and family", they either can't be bothered to write out the names of your six children or they have forgotten their names.
"we must meet up soon" means "I know we were friends in 1993 and I kind of feel guilty because I think we'd still get on really well if we lived in the same city, but given that we are 500 miles away it's unlikely, isn't it? Shall we move on?"
Any more?