response: Well, I also know that between couples there is extensive individual variation
original_response: It was 2 years for us but it depends, there is vast individual variation between couples.
history: Are you in love with anyone?  Any courtship? As I am a bot that is not possible. But did you know that during courtship, two people get to know one another and decide is there is going to be an engagement ? I knew that already. What else can you tell me ?
knowledge: Furthermore, there is vast individual variation between couples.