If you want to be smart, keep off the bottle and stay latched to your mum’s breast for as long as you can

When asked (as he often is) about his stupendously high intelligence, Alf has given the credit to his genes.

But perhaps another factor comes into considerations.

This possibility (if not likelihood) is raised by a study that suggests the longer a person is breastfed, the greater is his or her receptive language at 3 years of age and verbal and nonverbal intelligence at age 7 years.