Background: “Can Not Reproduce”, “Could Not Reproduce”, or “Closed, Not Reproducible” are commonly status codes in bug-tracking systems used to mark a case where the engineer was unable to recreate the environment or situation where the bug occurred.
In this strip the female, in need of a small child to test on, decides to have unprotected sex with her male coworker. But as it turns out she does not become pregnant and is therefore unable to “reproduce”, both in the human sexual sense and in the technical bug-tracking sense.
This strip employs a homographic pun.