How did Hades fall in love with Persephone?

When Hades saw Persephone he thought she was beautiful and he asked Zeus for permission to make her the queen of the underworld. Persephone was Innocently picking flowers when Hades burst up through the ground, grabbed Persephone by the waist and pulled her down into the underworld. When Demeter was told by HeliOS the sun who sees all what had happened and Demeter morned for her daughter. Demeter sent Word to Zeus that as long as her daughter was gone the earth would bare no fruit. Meanwhile Persephone did not eat anything out of spite towards her captor. People were dying due to starvation and eventually Zeus had to send Hermes to get Persephone back. When Persephone received this news she was so thrilled that she ate six (four, seven or eight depending on what version) pomegranate seeds. Having eaten in the underworld she was bound to the underworld (just one of the rules) so she spent six (four seven or eight depending on what version you read) months in the underworld and spent the rest with her mother. During the time Persephone is gone the earth is bare and fruitless (winter/fall) but the earth thrives when Persephone is with her mother (spring/summer).