Definite and usage of main principles and notions is of the most important requirements set for sociological researches. The categories of family and marriage are the most complicated and hardest to define. First of all, traditions of usual conscience and word usage that are not always correspond to those of scientific and theoretical nature; have impact on their understanding and definition. Secondly, both marriage and family are studied not only by sociology but by a range of other sciences which creates many different approaches to them and accordingly more or less specific and abstract definition of these notions.

The importance of taking responsibility for one's own health is a corner stone for a successful relationship. This is why many don't and what can be done about it.