When it comes to my replies, you do not have to match length.
But there is a difference between answering a multipara with a para, or a para with a few sentences, and answering a multipara with only one or two sentences. When you do that, your reply will inevitably lack either description of your muse’s mood, actions, or verbal reply.
So while you don’t have to match length, I need something to work with, or I may not know how to reply, and simply end up dropping the thread
– Sincerely, the mun