You may be deceived if you trust too much but you will live in torment if you don't trust enough.
A good motto is: use friendliness but do not use your friends.
The betrayal of trust carries a heavy taboo.
Well I think if you really go out with someone for quite a long time you do get to know each other very very well you go through the good times you go through the bad times. You know both personally but also within a relationship as well.
