Pondering

I have a memory of my Uncle and his then wife talking to me about marriage. This is the story I was told.
They went to have the "pre-wedding" talk with the priest. He looked at this newly engaged couple and asked them one question. It wasn't Do you love each other? or What are you dreams? It was "How do you squeeze your toothpaste? The middle or do you roll it down?" My uncle and soon to be bride looked at each other... I'm sure a phrase like WTF went though their minds. "We've lived with each other for years and that's never been a problem." This lead me to believe they both squeezed differently. They were married and had three boys. After 20 some odd years of marriage they went though the most bitter, messy, painful divorce I've known any people to have.
How do you squeeze your toothpaste?