By definition you must murder to be a serial killer, so in that regard they are incomparable to pedophiles, who only require an attraction without acting on it.

By definition you must murder to be a serial killer, so in that regard they are incomparable to pedophiles, who only require an attraction without acting on it. Interestingly a significant part of sexual abuse of children appears to be committed by people (mostly men) as a crime of opportunity, without them being primarily or exclusively attracted to children.