"Netflix and chill" is current code for having sex. The idea is that you go over to someone's house turn on Netflix and proceed to ignore it while you have sex. @hnbroseph was playing off of the fact that this is another phrase that when taken literally is innocent, but has implied meaning in a certain cultural context.

Though "Netflix and chill" is probably less ambiguous in most cases since it wasn't a commonly used phrase before it gained its implied meaning.