This will be a two part question, so please bear with me. I have been having a seemingly allergic reaction to all the cologne that I have been trying on and wearing the last few months.

What do you all think about the dangers of perfumes that you read and hear about?
http://www.ecomall.com/greenshopping/hrfragrance.htm

Part two of my question. In order to determine if my allergic reaction improves. I will just spray the frag on my external clothes only. What does this do, how does this affect the scent. In terms of top and middle notes not burning off? And what causes a frag to burn off or reveal the middle and bottom notes? Is it simply exposure to the air? Body heat? I am wondering how just spraying it externally on my clothes will affect the scent.