u/Internal_Advisor_320

My adult daughter’s friend eats at our house at least twice a week but never contributes toward the meal nor brings any drinks or snacks. She has suggested to him that he bring something but he always declines. Neither he, nor his family reciprocate with dinner invites for my daughter. I feel like he is being a mooch. Short of refusing to allow him to come over for dinner, how should we teach this young adult social etiquette?