My role in my peer group...and other topics

I have some different friend groups-from School in Valladolid, from wonderful summers in Cadiz with my grandparents, from my Hall of Residence in Madrid, from Journalism College, grom some previous job...so I chose one of them to talk about.
My peer group is formed by four friends, two men, two woman and their respective couples. Three of this couples are "formally" married. The last one live together.
We met in an Outdoor Advertising Company. We worked together during ten years. Their occupations and ages are: J, man, 33, Graphic Designer. M, 34, works in the Departament of Human Resources, C, woman, from Argentina, 33, Management Secreatary. And me, woman, 35 today, Journalist, but I worked like Graphic Designer too.
All of us are Media Class. Two members of my peer group are Catholic, M and me, the other not. Three of us bought a house and one or two cars, but J, live in a rented flat with his girlfriend who is ten years younger than he. For him this is a status symbols-her young, pretty and studient girlfriend because he hasn´t a house neither a car-he doesn´t drive.
My role in my group always is make and suggest relaxed and funny plans, dinner at home-I cook a lot of times for them on Saturdays, a Theather plays-occassionally- or Cinema. But J, 33 think I am a little BORED!. I don´t think so, and my other friends either. HE IS THE STRANGE, the "allien" in our group because he is like Peter Pan. He goes out every Thursday, Friday an Saturday, to discos, drinks, parties every weekend!!! Till 6 AM!!! Always!!! His girlfriend is studying at home and he goes out with his friends.
I can´t understand some of his behaviours but I love and respect him. When we worked together we argued every week, other work partners called us "the Pimpinella Designers", jeje
One of most important thing in my peer group is being genuine and honest.

I am E.T little sister. Do you want to be my Earth friend?

When I arrived here, I didn´t understand anything. Here, on Planet Earth, people is educated in big buildings which are called "Schools". There are one person, an adult, a big one person, who has the Knowledge-or, at least-everyone thinks that he or she Knows. On Planet Earth everyone call him-or her- "the teacher". This person shows and explains the subjects to a group. This group is formed by little persons which are called "pupils". They learn what the teacher explains. All of them are in different "classes"-those are like little or big rooms in a house. The house is School.
My friend, could you explain me why Education on the Earth is organizated on this way? Why are they all together? Why is there only one teacher for a fourty or fifty pupils group? Why?...
-The Earth friend answers-"Because is easier for the society this kind of organization. It´s cheaper, it´s easy to organizate all group and transmite the Knowledge, it´s more simple and better on this way".