In a clip on TikTok, Candida Villa-Lobos, 29 and Sebastião Oliveira, 28, attempt to coax a grin from their 2-month-old son, only to be met with an expressionless stare.

When 7-year-old Ellison Eubanks sat in the salon chair for a haircut, his mother wasn't sure whether they'd both be leaving in tears. It wouldn't be the first time. "He's always struggled with ...