Authorities want to rein in the prostitution that's rampant in resort areas ACAPULCO, MEXICO - On a sweltering afternoon in this glitzy tourist resort, Alex Fernandez laughed and joked with a group of his fellow homeless teenagers until the subject of prostitution came up. Then his smile disappeared, and the face of the skinny 14-year-old turned to a cold, unblinking stare as he described how grown men, sometimes Mexicans and sometimes foreign tourists, regularly take him to hotels and pay to have sex with him. "Yes, they buy me. The business gets me food. It gets me clothes," said Fernandez,...