Why feel comfortable by flowers?

A room with flowers

It is said that flowers which are put in a room have an effect in sharing space such as:

• Dining room in home
• Reception at office

People are likely to feel comfortable if flowers are put in same space. In terms of communication, something common works between 2 guys. For example, common hobby like sports would enable to guys talk a lot about it. It happens in information space. So does happen in physical space. Flowers can work as common stuff between people and encourage them to communicate easily and comfortably.