Watching pornography has been linked to risky sexual behaviours among teenagers, including not using condoms.
An Australian study on sexual health has found that young people who consume pornography from a young age are more likely to engage in sexual behaviour early on.
And weekly pornographic viewing was significantly associated with inconsistent condom use with casual partners, engaging in anal intercourse and sexting.
The research was conducted by the Burnet institute's Centre for Population Health and will be presented at the 2014 Sexual Health Conference in Sydney on Thursday.
The study's lead researcher Dr Megan Lim said while sexual behaviour is incredibly complex, there is a strong correlation between watching porn and sexual behaviour.