So when you live in a shared student house and hand-written signs start to appear in the kitchen, it's a sure sign that relationships have started to break down.
"Please do not take my food out of the fridge."
"Will whoever borrowed my cherry stoner please return it."
"Please make sure you turn the oven off when you leave the kitchen. Please."
While on holiday in St Ives, we found another prominent case of relationship breakdown.
The notices on Smeaton's Pier made us ask "Who on earth would do that?"
"Holiday makers - that's who."