Divide your bukkake group into two equal teams, then race to see which team finishes first. You can allow everyone to compete at once in a free-for-all jerk sprint or set up a relay where each member must blow a load before the next one can begin. Participants can begin completely limp, semi-erect or fully erect, depending on the nature of the competition.

A variation on this theme would be to collect all of the ejaculate from each team in a jar or bowl and see who can come up with the most volume. The receiver gets to drink the winner's cum!