The current study found support for the existence of the functions of internet offending in a Dutch sample, as found previously in qualitative research. According to 43 internet offenders who completed the Internet OffenderÁFunction Questionnaire (IO-FQ), the avoidant function was most salient for this internet offender group. Furthermore, based on the internet offenders' self-reports regarding their sexual behaviour while watching child pornography (assessed with masturbation), two groups emerged: those who did masturbate (sexually motivated) as opposed to those who claim to have never masturbated (non-sexually motivated). Sexual motivation proved to be a prerequisite for the function of sexual arousal, especially in relation to an exclusive sexual interest in children. For the non-sexually motivated subgroup, the sexual arousal function was of no importance for accessing child pornography.