"Boys are icky," Alexa Farmer said to her mom in the car one afternoon when the subject of guys came up a couple of years ago. "Well, do you like girls?" her mother asked in the same joking way. "Yeah," said Alexa, turning serious. She suddenly felt scared and wanted to jump out of the car. They were both quiet, and then Alexa's mother looked at her, expecting her daughter to say it was just a jok