 Mill goes on to stress that the harm principle is meant to apply “only to human beings in the maturity of their faculties” (Mill 1975,15). So, the principle permits paternalistic intervention in the case of those who are not competent to make an informed decision about what is in their best interests for themselves, and so who “must be protected against their own actions as well as external injury” (Mill 1975,15): for example, young children or those adults whose decision-making abilities are temporarily or permanently impaired. Thus, if there is reliable evidence that consumption of violent or misogynistic pornography impairs adolescents’ ability to have successful long-term egalitarian sexual relationships, then there is a strong liberal case for enforcing tighter age-restrictions on consumption of pornography.