Responding to posts with a gif without saying where its from/who it is

I see this a lot in doppleganger subreddits, movie recommendation posts, etc. How am I supposed to get the context of the gif if I don't know what is is? Especially in the examples I mentioned. People asking "who do I look like?" and then all of the comments are nameless gifs. Like not helpful. Same with movies: "Any recommendations for XYZ?" and then a bunch of gifs with no movie titles. I don't understand it. :)