Love at first sight?

I've always been unsure on how I feel about love at first sight. Granted, I have never been in love, so how could I judge such a thing? Well, I did. The protagonist Jonah, in Kurt Vonnegut's Cat's Cradle, conveys his love for "the girl on the cover" of the New York Sunday Times (80). Jonah claims that he "had fallen in love with [Mona] on sight" (80). Without knowing anything about this mysterious Mona Aamons Monzano, Jonah uses this enigmatic woman as the force behind his meaningless life (85). He dreames of being with Mona for the rest of his life, and uses Mona as the purpose behind him living. I would like to believe that this can possibly happen in life, finding a beautiful girl to devote your life and love, but I can't. Actually, I find it somewhat immoral. Basing love off of looks seems iniquitous to me, for I believe that many more aspects go into true love. I feel that once Jonah had the pleasure of being with Mona, he realized that too. Although he did love her for her beauty and grace, he found that she "loves everyone" because it makes people happy (207). He only wanted Mona to love him and only him. With this conflict, Jonah became controlling and jealous, ordering Mona to stop loving others. With this I question, would he have fallen in love with her if he knew of her loving personality? Who knows.