In tsukimonogatari, theres a ecchi related joke that goes over nearly everyone's heads. in the bathtub scene where Tsukuhi and Araragi bathe together. She wants to tell Araragi a one liner joke. She poses sexually with soap suds barely covering the important parts and calls the pose, metropolitan ordinance. Araragi gets upset that she does that, splashes water on her, which washes away the suds (not depicted). Metropolitan Ordinance is a shorten name of a law/comittee that sees to censor obscene materials from impressionable youth. When the show was airing, the law was updated, passing responsibility to publishers to enforce it. So the crux of the joke was a jab/provocation/attack on that law. ---
Your palace may last forever, but my yurt can go anywhere.