1 вопрос) In Russia, at a meeting, farewell, congratulations from relatives and friends, whether people of the same or different sexes need to hug and kiss each other in most social situations, this is most often a kiss on the cheek. In Russia, there is a unique custom associated with a kiss. According to tradition, when they meet and say goodbye, Russians (especially friends or relatives) hug each other and kiss three times on the left and right cheek. This old tradition is popular not only in the everyday life of ordinary people, but even in the highest political circles. In Russia, officials at the summit often kiss each other in front of many officials and journalists to show heartfelt attitude.

2 вопрос) they talk about. what are they? What do you do? so that the meeting is not necessary.

3 вопрос) people avoid topics about family, about your problems, your past.

4 вопрос) people feel uncomfortable. they think you will understand them.

Надеюсь все правильно.