Both stream instantly.
Explanation: This joke humorously compares Netflix, a streaming service known for its instant access to movies and shows, with diarrhea, a condition characterized by frequent, uncontrollable bowel movements. The punchline “both stream instantly” plays on the word “stream,” which refers to both the way content is delivered on Netflix and the rapid flow associated with diarrhea. The humor arises from the unexpected and somewhat crude connection between two very different subjects, highlighting the shock value and absurdity of the comparison.