What is Opportunity Cumpletion?
Based loosely on the economic principle of opportunity cost:
1. It is the act of withholding ones orgasm during masterbation in hopes of finding a better scene/camera angle in the pornographic video you are watching.
2. The difficult decision that must be made during intercourse as to when it is acceptable for a male to finish.
I waited until the end of the film for my opportunity cumpletion.