I’m not entirely sure he was joking! 
In Japan for example, genitals have to be censored out - at least to the degree that no detail can be seen… Although breasts are fine… but just to reiterate Canon’s point, different countries have different legal requirements.
Soooo… if you did go… like… really really hardcore, you’d have to research the laws of each country you intend to sell to and adapt the content accordingly. Similar to how Bethesda had to remove all Nazi symbolism to get Wolfenstein The New Order released in Germany.
This is especially difficult if you just want to sell your game from your web site since you’d have to make sure people from Japan (going back to the previous example) couldn’t buy it.