He cannot put on weight because of a condition called lipodystrophy that makes his body rapidly burn fat.



Mr Perry regularly eats Chinese takeaways, chips, chocolate and clotted cream, but his weight has remained stable at 11st 12lb.



He told the Sun that he used to be a chubby child, but at age 12 the fat dropped off "almost over night".



Doctors thought he was refusing to eat or had a stomach ulcer, he said.