One toddler in the U.K. has stunned his parents with an obsessive predilection for carrying around a mannequin doll head wherever he goes, even sleeping with the hairstyling training tool each night.

Child sex abuse doll torsos and disembodied heads are being offered for sale on Temu and Shein in what advocates say may be a bid to get around Australian laws. Campaigners say the products are ...