The rule, or measuring rod, which the behaviorist puts in front of him always is: Can I describe this bit of behavior I see in terms of "stimulus and response"?
I always tell people, if you want to be successful, find someone who has achieved the results you want and copy what they do and you'll achieve the same results.
The only relationship that can make both partners happy is one in which sentimentality has no place and neither partner makes any claim on the life and freedom of the other.