OK, dcg. Here's the scoop. I carry a wallet to hold my id. This is necessary because when I go shopping with the lovely Mrs Bobber, she picks out what she wants and abandons me at the checkout. I will write the check and be asked for id. I have it right there in my wallet. She keeps hers in her purse. Purse being defined as a receptacle for stuff that is immediately transported to another dimension. Were she asked to provide id, it would take hours to locate. By having a wallet holding my id, we can be out in minutes.