Smile is the way of Expression of your Emotions.A happy people always express his happiness by a smile. Ofcourse, love, sorrow, affection are express through smile too.How to express excitement, How to express anger, How to express surprise, How to express frustration, How to express affection, How to express sorrow, How to express interest, how to express regret, How to express feelings, How to express thanks, How to express condolences, How to express love, How to express gratitude, How to express pleasure, How to express satisfaction,