In case someone do not understand the meme innit. “我们中/出了一个叛徒” literally means 'There's a betrayer among us.' but if you interpret “中”(among) and “出”(there be) in one word “中出”, then you'll get creampie(中出). So that's it.
So mamizu's word is interpreted as the former one. But the four ones below all interpreted mamizu's word as the latter one.