(Strip Number 1132, Original Publication Date, 9 April 1987)
Panel 1: When break-time comes, exhausted John looks for a soda machine.
Panel 2: When he finds one, he also finds Jean's husband talking about how they get to do the polka and waltz next.
Panel 3: He then confides that he that he doesn't really want to be here either but it's just something a man hasta do for the sake of his wife.
Panel 4: When he compares it to the unpleasant necessity of having a vasectomy, John is not ecstatic.
Summary: Well, this explains why Brittany doesn't have any brothers or sisters. It's also a distant foreshadowing of another strip in which John/Rod is cruelly mocked for blanching at the idea of having surgery to keep Lynn/Elly from having another baby.