I smell a perfume on a girl, and rush to buy it! then I hate the scent's reaction on my skin. The next day I smell it on the same girl, I still adore it, but I don't like it on me.

Also I noticed a difference when I spray the perfume in different seasons. I have perfumes I don't wear in the summer, but I love them in winter. Guess this is why there summer and winter perfumes?

Not sure though.

Salam