Humans are lonely and melancholic creatures.  So am I.  I want to be with someone, want to be someone, and want to share my life with someone else.  So I hand out the key to share my life, the key opens the door to start a new beginning.  Life-turning moments that might become the key would appear in front of you or sometimes you have to go grab it by yourself.  There are some doors that should be opened and others that shouldn’t, but you wouldn’t know what would come out unless you open it.