Etymology

From the rotational symmetry of the numeral 69 – if rotated a half-turn (by 180°), the numeral remains the same, and a couple both giving oral sex at once have, in principle, a similar rotational symmetry.

Pronunciation

• IPA^(key): /niːɔtresər/, [ˈniːˀʌˈtˢʁ̥æsɐ]