Given scene/plot descriptions from movies or TV shows, and given a specific question about the scene, summarize the question into a title

[Q]: I witness lots of porn parody titles start with "This Isn't".  Example:    This Isn't Fifty Shades Of Grey,     This Ain't Avatar XXX,     This Isn't The Twilight Saga: Breaking Dawn: Part 2 - The XXX Parody.   What is the significance of "This Isn't" in porn parody titles?
[A]: What is the significance of "This Isn't" in porn parody titles?


[Q]: In Interstellar, when Murph visits her brother and his wife, she notices that their son is coughing hard, and she offers to arrange a visit from a doctor for him. The brother and his wife refuse, however, even though she warns them their son will die otherwise.  Did it signify anything? I thought that maybe it signified that there is an anti-science movement because of the blight. The brother certainly seemed to dislike his father and sister's scientific pursuits.
[A]: Why did Murph's brother and his wife refuse a doctor for their son in Interstellar?


[Q]: What does the ending scene in the movie Basic Instinct actually mean? After the killer has been caught by the police, we see in the last scene a very suspenseful, cliffhanger sex scene. Can somebody explain the ending of that to me? Does it mean the real killer is not caught after all?
[A]:
What does the ending scene in the movie Basic Instinct actually mean?