Additionally, the Monogatari series is popular among hardcore anime fans in the Middle East due to its wordplay and unconventional storytelling — a perfect match for a meme-worthy line. Some doubt the accuracy because it’s so vulgar. However, official and fan translations agree. The original Japanese script in the light novel (by Nisio Isin) explicitly writes: 「ゴムをつけろと言いましたよね」 — the verb tsukeru (to attach/put on) with gomu is universally understood as “wear a condom” in adult contexts.
So, literal: “That you should put on a rubber — I said that, didn’t I?”
So yes — it’s 100% real, intended, and perfectly in character for Senjougahara. If you enjoy this type of darkly humorous safe-sex dialogue, check out: