Why Do People Fall in Love-U

Why Do People Fall In Love U=Understanding Ah--U was a difficult letter for this topic. I thought of unusual, also, but decided to go with understanding. There are just some people who seem more understanding than others. Not that they always take your side or agree with you, but that they are willing to listen and let you talk through something and can at least get what you are trying to say. I also think it's a demeanor of sorts. Maybe more laid-back? What do you think? Am I on the right track or should I have went with unusual?