I should check if there's any cultural context I'm missing. In Indonesian internet slang, "kebelet sange" might be a way to express a strong urge. "Maen di kamar mandi" is straightforward as "play in the bathroom". The number "11" could be part of a meme, a timestamp (11 PM), or a typo for "satu-satu" (one by one) since 1 is "satu". But "11" as "dua belas" (12) in Indonesian. Not sure. Maybe the user is referring to two siblings ("1 dan 1")?