Yep, it is called evolution and enlightenment. It epically sucks while making you write epics in areas that over the long haul make you feel "bland".
Relationships are the puzzles to make the box to haul the sex toys of two or more people.
What I have found recently is the subtle thing our minds do to use our libido and sexuality to cover and deal with the mental and physical pain in our lives.
As for your therapist ... my advice is to add one word to blow her mind.
I am in an "open" relationships with a married man. It isn't my "only" intimacy based relationship so please don't restrict me with your monogamy based views please.