Why does perfume smell good?

                      What is in perfume?

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google images :)
Perfume is a mixture of fragrant essential oils and aroma compounds,fixatives,and solvents.

                    What is essential oil?

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google images:)
A liquid that is usually distilled(mostly by water) from the stems,roots,bark,leaves,peddles and other parts of a plant. 

          What are aroma compounds?

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goooooogle images :)
Aroma compounds (also known as aroma, oderant, flavor or fragrance) is just a chemical compound that has an odor or smell.

What is a fixative?

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google images:)
It's something that protects or preserves a liquid mixed with perfume to prevent evaporation.

The Process of Smelling

http://www.youtube.com/watch?v=07W6ObV0eeI&feature=player_detailpage