When you think about it, it is amazing the variety of subtle ways we communicate with each other - a glance of enquiry, a nod of recognition, a smile to convey acceptance, a single word to provide encouragement. Even a blink might convey a whole array of affections.
Yesterday you chose to simply curl a finger around mine.
Although it was an imperceptible movement, it seemed to be a definite attempt by you to say ‘Hello again!’