Very good natured disagreement with a friend about this.
I keep my house and car keys separate. My logic is that if I lose my car keys, I can get into my house to get the spare. If I lose my house keys I can drive to where I keep the spare.
She keeps her house and car keys on the same bunch. Its easier to keep track of and more convenient. Keeping them separate means that I am more likely to lose one set as they are harder to keep track of.
I think that she is daft as if she loses her one set of keys, she is screwed both ways. She thinks I am daft to give myself another job when I could just have one set of keys instead of two.
So, who is BU? Me or her?