69'er

• 69
• niogtres

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.

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

69'er c (singular definite 69'eren, plural indefinite 69'ere)

1. (sexuality) sixty-nine (a sex position where two people give each other oral sex at the same time)

•   69 (stilling) on the Danish Wikipedia.Wikipedia ^da