Giving out phone number

I've got a Barnes and Noble discount card. Well, technically, Christa has it. When I use the membership, I need to give out my phone number. Today, I bought things at Barnes andNoble at three different times. Each time I was taken care of, it was by a woman. Each time, I had to give my phone number to get the discount.

I wonder how my wife would feel about me giving out my phone number to all these women ?????