In essence, a cumfootprint is the collective result of the arousal one person inspires in others, measured by the overall amount of cum generated when individuals reflect on, observe, or intimately interact with that specific person.
In General, a cumfootprint is a measure of the sexual arousal they cause in other people, specifically quantified by the amount of ejaculate produced as a result. It implies that the presence, actions, or influence of a person can lead to sexual reactions in others, and the cumfootprint aggregates these reactions. This concept draws a parallel to other "footprints," like a carbon footprint, but in a sexual context.