What are the reasons flowers smell so good?

[noorkhurshid]

Flowers smell nice to attract insects or other animals for pollination. Flowers and plants have a process by which they reproduce. When it comes to flowers, they produce seeds that, over time, enable the growth of more flowering plants. They do not have everything necessary to make those fertile seeds. As a result, pollination is necessary.

[Walt]

I absolutely love the small of lavender, roses, and milkweed. 
If I was only allowed to pick one, I wouldn't know which one to pick, because I love all three equally.

[noorkhurshid]

I haven't  smell the lavender yet but jasmine smell is also vey pleasant at night