Sexual assault, according to criminal law professor Khiara M. Bridges, who outlines strategies to teach it properly:

[F]irst, I avoid any attempts at humor during the unit, which is a departure from my approach to the rest of the class. Criminal Law frequently involves people doing horrible things to other people. The fact patterns of the cases are awful much of the time. So, as a professor, one could go into the classroom and lament man’s inhumanity to fellow man for an hour and a half; or, one could treat it like a dark comedy. I typically choose the latter. I prefer the Fargo approach to the There Will Be Blood approach … except during the unit on sexual assault.

In the comments section, Andrew Selbst makes a salient point: