Books on Amazon:
Definition Preference Utilitarianism/P. Singer/SingerVsBentham/SingerVsMill/SingerVsSidgwick: my utilitarianism is not about the growth of happiness and the reduction of suffering, but about promoting the preferences of those involved.
General Public/ethics/P. Singer: Preference Utiliarianism cannot be inferred from the universal aspects of ethics.
Preference: the preferences of the individual must be weighed against the preferences of others and the community.
Where do we get a theory from that governs this? We approach simple, pre-ethical choices. However, we cannot rely on intuitions because they can be inherited evolutionarily and therefore be unreliable in terms of what is right.
Preferences: can be for different individuals at quite different levels. Someone who would like to be a poet may forgo other forms of happiness. This cannot be pursued further here.
Practical Ethics (Third Edition) Cambridge 2011
The Most Good You Can Do: How Effective Altruism is Changing Ideas About Living Ethically. New Haven 2015