Just as an aside before the post: it has always bothered me that you can spell grey/gray two different ways and both are equally correct. Irritating.
A frequent theme here is how young I look. Well, a new development in this is that I've started to get some grey hair. It's not very noticeable unless we're in very bright light, but it's there. The problem is, I still have a face that makes me look 25.
Patient: "Doctor, I know you think it makes you look older, but I wouldn't get those grey highlights again if I were you."