Okay, and then, when you're talking about the changing of needs, a lot of that time, it applies to circumstances, right? The first C of the N3Cs. So how does circumstances and compatibility fit in together? >> Yeah, this is a very good question because very often, when we think of needs, we think of them as something that is stable that pertains to the individual, right? But when you bring in circumstance, then you see the interesting interaction between the person and the circumstances. Say for example, I work a lot with the immigrants. When someone comes from a different country to a new country, circumstances change. And because the circumstances change, right, a person's needs may also change. So say for example that someone is a respected scholar from South Asia coming to Canada and then cannot find a job in a respectable university here, alright. So, the person's need for esteem, for respect, for social recognition was actually very adequately met when he was back in his home country. And then he obviously didn't experience a strong need for those, alright? But after coming here, all of a sudden, you're in a new set of circumstances, and the means for gratifying those needs have disappeared. Then you will be looking forward to situations in which you can have your need for esteem, need for recognition, gratified. So, and before this person even realizes, Like his relationship style might have already changed. And he is all of a sudden seeking more approval, more recognition, in his intimate relationship than before, right? And then if the partner is not aware, because like the partner might have his or her own needs as well, right? Then the circumstances can actually create a challenge for the relationship. And then you can easily think of other circumstantial challenges, like say for example, a car accident, or someone who suddenly got laid off, right? or an acute illness. All these changes in circumstances can obviously impact on the partner's needs and also on how they deal with the relationship.