Brain scans of psychopaths show areas of the brain that govern emotion in psychopaths aren't as active as a normal adult's.

CNN: Bad bosses: The Psycho-path to Success?

This condition is called constitutional growth delay, and these individuals experience their growth slow-down a few years later than their peers while still reaching a fairly normal adult height.

CNN: What can I do to grow taller?

Defending the proposed changes, Home Office minister Lord Henley said that "whatever the setting, we believe that parents have the primary responsibility for educating their child in how to react to an approach from an adult if it goes beyond that adult's normal role".

BBC: UK Politics