What Are the Signs of Chemistry Between Two People Relationship

There's no question about love being a real, strong emotion, but how about chemistry? Is it a physical phenomenon with sparks and butterflies or a chemical reaction dictated by pheromones, odorless substances all mammals produce to get into the "love making" mood. Turns out scientists approve the existence of chemistry between two people and the link between falling in love and good chemistry.

Definition of Chemistry Between Two People