“Nature was in deadly earnest with me when I was in jest with her.” 

Love as Chemistry: Valentine explains love in scientific terms. He believes that the attraction between a man and a woman is like a chemical reaction. He says,

 “No, no, no. Not love: we know better than that. Let’s call it chemistry.” 

Anti-Romantic Attitude: Valentine does not idealize or worship women. He rejects the idea of kneeling before a lady or praising her blindly. He expresses love through action, not words. His direct and honest approach makes him different from romantic heroes.

Thus, Valentine defines love as real, natural, and human. Shaw uses him to reject false romantic ideas. His love is based on truth, instinct, and understanding, not on dreams or emotional exaggeration.