nothing embarrassing. "a nipple" is a valid technical term for many similar items, he could understand if he want.
it happened to me once, i forgot the name for a tube, and called it "balloon" -- they gave me a tube.

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Оно и так совершенно не embarassing. Шапочки для сосков --- дико круто, я считаю.

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Шапочки для сосков cовершенно не круто ибо дискриминация!

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