Relationship

Define relationship. How do you define a perfect relationship? Does it have to be blood related?

DEFINITION ABOVE IS FROM GOOGLE

FATHER - DAUGHTER RELATIONSHIP

I think love is one of the main ingredients.. trust.. benefit? Sincerity too.. does a pinch of jealousy needed for a good taste in relationship? Haha..

FRIENDSHIP RELATIONSHIP

Please tell me what are the best ingredients for a perfect relationship?