He needs his own

The little things you have to get used to about living with someone would be the things you’d laugh at if you were an outsider watching as the scenarios play out.

I was at CVS yesterday where a couple was walking down the travel aisle where you can get anything you need, miniaturized. The girl picked up a tiny tube of toothpaste and placed it in the basket she held. Her boyfriend did the same. She told him she had already picked up toothpaste, thinking he did not see her. He said he knew, but he needed his own. She said, what he probably already knew, that they were only going away for a short time and one toothpaste would be enough for both of them. He agreed but said he needed his own. She called him crazy and he laughed. They kept discussing it. To him it was simple. He needed his own.

Why though?

To her, it was impossible to understand—why spend more when we have what we need? And why don't you want to share with me? Perhaps she, the woman, was acting as the more practical and rational one this time.