“Daughter and her husband after 10 years of marriage behave like a couple of teenagers infatuated with each other. They hug each other in company, they kiss and say "little nip" “kiteńko”, „Pimpusiu” e.t.c. Even I feel embarrassed by this fleshing. Is this normal behavior?”
It is not normal either, nor universally accepted. Normally, people in love are restrained in showing their feelings to others. Behavior, which you described, it may have three or more causes. For example. it may be related to the mythomania of both partners. They are both firmly convinced, that everything, what are they doing, is the smartest, the best. Couples like this often demonstrate their love for quite independently, what's really going on between them. "Pimpus” then they serve to emphasize their uniqueness. Sometimes, blinding can be a defensive attitude. The point is, to – in spite of the facts - to lie to the hurdles: "You can see for yourself, how we love each other”. "Drinking out of mouths” it can also indicate a tendency to consciously irritate the environment. The couple wants to shock by demonstrating their own superiority and contempt for others, knowing, that these others have a completely different way of being. Let them have, they don't care. This behavior can also be due to the immaturity of partners. Then demonstrating their happiness in children takes place in spite of the weariness and boredom of other people, "Worse”, "Poorer”, "Dumber”…