Nervous Ninnies

My DH has a nail-biting habit that is driving me NUTS. Only nervous ninnies bite their fingers, not professional business men in smart suits. I made him promise (which isn't fair of me) to stop this habit by the time David was born... Okay, maybe I'm manipulative but I was hoping that this would be an incentive you see. He's been chewing them for years and it's been getting progressively worse. I don't want D to learn how to chew his nails from his father. You may think this is minor, and it is. But you have never seen such shocking nail bitten fingers as DH's. Only half the nail manages to grow and it looks terrible. He looks so handsome in his suit and tie, lovely cuff links, and then you look at his hands!! Oh dear - help. What to do?
So obviously with new baby, fatigue, me being grumpy (maybe the baby blues?) I just don't feel much affection toward him, and the nail-biting just erases any nice thoughts I might have had. So I booked him in for an appointment with a nail technician tomorrow to have fake nails put on. He's agreed to it, but I think he's going to bite through the R500 of fake nails... and curse me as he's going to be in having them put on in the reception where he could be seen!
(Just in case you think I'm cruel - I did not plan that part, this is where the techie works, at least it is very early on a Sat am and most of the world is not up and about)