Aww, Willow witch, what a sweet guy you have there. :28: And what an awesome bond you must have between you two.
I agree with One Walker, it probably does have some to do with both factors, and the connection you two have can do nothing but help as well.
I noticed that there's not really a section here that deals with the chakra, necessarily, it's kind of posted all over- so here is as good a spot as any for your query. (All the other areas I found it mentioned were in an applicable section to the specific question- like the thread on 'chakra meditation' is in the meditation section...)
There are two chakras in the head, the crown chakra (more or less at the top of the head/hair line) and the brow/third eye chakra which is between the brows/at the third eye. Either one (or both) could be involved with your reactions to your restful sleep-kiss. Here's what I found on both of these chakral areas:
Crown Chakra: (top of head)
Color- Violet
Psychological functions- Knowingness, Wisdom, Inspiration, Charisma, Awareness, Higher Self, Meditation, Self Sacrificing, Visionary.
Emotions- Bliss, Spirituality
Brow/Third eye Chakra: (forehead/brow region)
Color- Indigo
Psychological functions- Intuition, Invention, Psychic Abilities, Self Realization, Perception, Release, Understanding, Memory, Fearlessness.
Emotions- Imagination, Intuition
...Hope some of that helps! Though, some things are just meant to be enjoyed rather than investigated-- if you aren't finding a specific answer, there's no need to... just relish it, I think.

:28:
~BB~