A friend of mine gave me a bottle of Aqua de Parma about 10 years ago. This was way before I was interested in shaving and fragrances etc. So I never used the stuff. I recall I liked the scent when I first got it but I just never used it. Now I am interested in shaving and fragrances and I just sprayed some on and it seems to me the scent has changed. Would a good cologne like Aqua de Parma change over a 10 year period? If so what is a reasonable shelf life to give a cologne before you risk messing up it's scent?. Thanks.