"Well that was hard!" "That's what she said" Turning seemingly normal comments into sexual innuendo by adding the words "That's what she said" is a cultural phenomenon, appearing everywhere from TV sitcoms, to internet discussions, to movies.
Recurring bugs in software development are normally a sign of a problem in the development process. Unit testing is one method used by development teams to solve this problem. At its core, unit testing is about writing a series of independent small tests to check that individual functions within the code base are doing the right thing.