From Episode 3x02: The Kids Are Alright
Sam and Dean hunt changlings targeting mothers and their children. Dean has a reunion with Lisa, a woman he once had a one-night stand with. Her son, Ben, strongly reminds Dean of himself. Though it makes him uncomfortable, Dean's natural instincts with children helps him get to know the boy, and watch with pride as Ben stands up to a bully. Meanwhile, other mothers admire Dean's... assets.