NOTE: This is just an effect of my thinking. No research or something like studying is conducted.
As defined by Google, using define:gravity, gravity is the force of attraction between all masses in the universe. And based on the definition, gravity exists on all, even people. So people have this so called attraction to other masses.
So, for my question, is the human gravity mistakenly call as the vague and unexplainable word "love"?
So what if love is just an effect of human gravity?
Maybe people's feeling is so sensitive that they can feel even the weak human gravity.
Come to think of it, when people is in love, they tend to be attracted to somebody and want to be with them all the time. Maybe it is somebody's gravity that attracts and causing the effect of wanting to be with them all the time.
If that is, maybe Moon is in love with our planet Earth!