Relationships break up because of a number of reasons. Name and explain TWO factors that contribute to a detrimental relationship.

1) cheating : if one of the people, without the knowledge and permission of the other (the permission is the most important) has other relations, this will lead to feelings of betrayal in the other person

2) abuse: when one of the people in the relationships abuses the other (emotionally, physically financially and in other ways), the other person will be unhappy and will seek to beak off the relationship