Is there a psychological or genetic reason for this seeming passion?

People love to do various things for various reasons. Sometimes even without a reason. There is no need to find a reason behind everything. The love to do something must be felt. I love my Harris's hawk. I love to sleep with her. I love when she lay down on my neck, and we sleep together, cuddled. I love to walk in the nature with my Harris's hawk on my arm. I love to sit with my Harris's hawk on my arm. I cannot explain why I love it. I just feel the love every time, when I am together with my Harris's hawk, and that is enough to be happy in the life.