They say love moves the world, but music also makes it regardless of whether or not someone is in love. And precisely, that inspires a love song, the "maybe" becomes more interesting topic to talk about love.
The story is constructed in the mind of the listener that melody is full of nuances and possibilities. It's like a musical novel where the audioescucha is director.
When there are strong emotions, powerful enough to shake the artist emotionally, as heartbreak, a break or unrequited love, make a trigger to inspire a song.
Because emotions are something purely human srive connection between several people.
Precisely the love songs are like poison to those who feel sadness, but when there is love, the love songs are so beautiful to the lover, and with his partner that song becomes not only each other but part of its love.
Popularly lovers can call it as our song.