So often I catch fascinated glances of girls I consider friends, so often we keep the ball of flirt rolling, so often we hug and kiss each other when greeting. Friendship is a great thing, but sometimes I feel that I rather need a girlfriend than a friend, but I feel rather uncomfortable about offering dating to a girl, who considers me just a good friend.
My idea is inventing a special chemical that would react to such physiological cues as the raise of blood pressure and temperature and perspiration increase caused by sensation of love a girl might experience in my presence if I attract her, changing its color proportionally to feeling intensity. He-he, it would basically be a practical love indicator.
I would apply this substance on all those Valentine cards I distribute among my numerous female friends and afterwards check how much in love they felt when receiving these cards from me