One teacher told how she and her new boyfriend snuggled up for the night, only to have her tomcat jump on top and soak them with urine.
So they heaved aside the soggy duvet and decamped to the second bedroom. But Tom came in and did it again.
They ended up having to grab a couple of blankets and sleep on the sofa downstairs.
As Goldfinger says, "Once is happenstance. Twice is coincidence. Three times is enemy action.”