The man is a social being, always wanting to have someone to speak with, looking for company and sharing the good and bad. So having a fulfilling social relationship, like friendship, can make us more productive and, thus, more successful in the professional area. When you go to work knowing that you will meet there people with whom you will spend a pleasant time, can be more motivating. The opposite is to go to work where nothing appears welcoming, this condition reflecting on your personal performances. So, having a colleague as friends will keep you happy, and productive, as multiple studies show. You have with whom to share opinions and disconnect from work in lunch breaks, making work more comfortable place.