Of course they do!
Not speaking scientifically here, but they put me in a good mood.
That's why I buy myself bouquets as often as I can.
(Why wait for someone else to buy them for you? Be that someone.)
They make me happy just to be in their existence. That simple.
They give me a connection to nature that is soft and vibrant.
One connection that brings me peace and happiness.
Arranging them and trimming their stems is a joyful process.
I never can choose a favorite.
Perhaps all of them.