I have herd the groom buys the brides and bride buys the grooms? But do you really have to do it that way. My groom didn't even pick out my engagement ring. We were "just looking" and I picked one that I loved and two weeks later he proposed! I really had no idea though because I always want to go look at rings? Lol anyways.... Me and my mom are doing some wedding shopping over the weekend and would it be terrible just to pick out the bands I want to get and buy them without the groom. He's not picky and will wear whatever. The whole wedding planning he has always said it's up to you, whatever you want. So I don't think he will have a problem with it.