It doesn't in itself matter what kind of thing we do. What matters is that we maximize good results. This view says that we ought always to do whatever maximizes the balance of pleasure over pain for everyone affected by our action. This view could be based on the golden rule, which leads us to be concerned about the happiness and misery of others. Or it could be based on God's will, self-evident truths, or our own personal feelings.
Many utilitarians reject exceptionless rules.
They think that any rule should be broken when it has better consequences to do so. This set has 36 problems.