To dream of ejaculation represents the finality of a decision. You have chosen to do whatever it takes to make a choice, or do something. Feeling good making a choice.
To ejaculate during sex represents the finality of a choice that produces a new life situation, habit, or insight.
To ejaculate outside the body represents unproductive choices, or disappointments. Feeling good never having to be serious about a final choice. Enjoying experiencing something without any obligations or new problems created.
To dream of a person ejaculating on another person represents feelings of lingering failure, unfulfilled promises, or disappointments. One aspect of your personality created a problem for another one. Intentional humiliation of others with more power than them.