By "horny jail", do you mean a jail that is horny, or a jail for horny people?
It's just like "monster house" - a house for monsters, or a house that is a monster.
Also, two more messages, and you'll have hit the Arceus number!
Once again I fell down the martial arts rabbit hole and am plumbing the murky depths of the internet's various martial arts and fighting crafts echo chambers.
If you're not actively involved and only get up to speed every few years or so, you can see the tide of public opinion flapping worse than my dong while I'm skipping naked down a hallway.