Does a NSFW forum exist or is a NSFW thread allowable?

Should all topics on forums be SFW? I’m guessing if I want to start a NSFW pony thread I would have to use the spoiler tags every time, or maybe label the thread NSFW, or is NSFW topics not at all allowable?
 
Like for example a thread about, “Which one of the mane 8 characters you’d want to cum inside in the most?” As a hypothetical topic.
 
Don’t know where to post this question but I guess site and policy is the best place to put this. :)

@MaresFillies  
Check the “Rules” post in each forum for what’s allowed. In general Art and Generals allow NSFW threads as long as they’re marked as such. And the thread title itself should not be overly explicit.

@The Smiling Pony  
So there isn’t any dedicated NSFW forum, rather you just have to look at each Rules post in each forum to know what is allowed.
 
Can’t we just use spoiler tags on the thread title then?
 
Something like: [NSFW] “Which one of the mane 8 characters you’d want to cum inside in the most?”
 
or is that not allowed?

@MaresFillies  
Not allowed.