Cockstaposition is an act or instance of placing close together or side by side two cocks for comparison or contrast. Often occurs in a threesome when the female chooses which cock she wishes to slobber on first. May also be used with larger groups of male partners.
Charlene and her boyfriend had a threesome with their friend Rufus. Prior to engaging in sex, the men did a cockstaposition. Since Rufus was slightly thicker, she blew him first.