That is, it is bad for an individual to get his aversions fulfilled (or preferences frustrated), and depending on the version of negative utilitarianism, it may also be good for him to get his preferences satisfied. A negative utilitarian with such a conception of well-being, or whose conception of well-being includes such a preferentialist component, could reply to the benevolent world-exploder argument by saying that the explosion would be bad because it would fulfill many individuals' aversions.[43] Arrhenius and Bykvist provide two criticisms of this reply. First, it could be claimed that frustrated preferences require that someone exists who has the frustrated preference.