New to the BDSM scene? You might have encountered @mentions _DOT .
I SPend time with PEople who might use this term sometimes.
Sometimes, not many people, they wouldn't even know the right way to use this term, but yeah, @mentions _changes_ DOT is an online slang term for something you do online all the time.
MH is also a term used by online people. Sometimes in online conversations, they will say "please don't change the email notification setting" and this might result in "change the setting"
