Universal truths.
A few little items that universally are felt by all!
1) Triangular sandwiches taste better than square ones.
2) At the end of every party there is always a girl crying.
3) One of the most awkward things that can happen in a pub is when your pint-to-toilet cycle gets synchronized with a complete stranger.
4) You've never quite sure whether it's ok to eat green crisps.