Most everyday users of pornography are heterosexual men. Looking at, and masturbating to, pornography is the routine practice of large numbers of men. And most of the commercial pornographic industry caters to heterosexual men. These men – and their consumption of pornography – are the subject of a growing body of research. This chapter offers an overview of what we can learn about heterosexual boys' and young men's use of pornography, focusing particularly on quantitative studies of the extent, nature and meaning of pornography consumption.