Why did Ainz tell Aura not to set her alarm on her watch at 19:19 and 7:21?


I came across this in the Trivia section of
[Bukubukuchagama](http://overlordmaruyama.wikia.com/wiki/Bukubukuchagama#Trivia)
on Overlord Wiki:

> Giving the watch with her voice to Aura, Ainz told her not to set an alarm
> at 19:19 or 7:21. These numbers can be read as a sexual word in Japanese
> wordplay. It seems that she recorded her voice for an H-Game at that alarm.

Since I don't know Japanese, I am curious to know how they are read.




As a [comment](http://overlordmaruyama.wikia.com/wiki/Bukubukuchagama#comm-
text-8408) pointed out in the wiki page you provided, the words which the
numbers represent seem to be a common thing in hentai games.

**For 19:19** :

> In Japanese when reading the time, or a string of numbers, it is often read
> as if each number is separate, for example, "One Nine One Nine". Doing this
> with 19:19 sounds a bit like " _Iku, Iku_ " which translates to " _I'm
> cumming, I'm cumming!_ ".

**For 7:21** :

> Thanks to [ʞɹɐzǝɹ's](https://anime.stackexchange.com/questions/24048/some-
> kind-of-wordplay-in-overlord/24051?noredirect=1#comment34657_24051) comment
> we now know that it sounds a bit like " _Onanī_ " which translates into
> "onanism" which is a synonym for "masturbation".

These are instances of
[Goroawase](https://en.wikipedia.org/wiki/Japanese_wordplay#Goroawase) word
play in Japanese, which takes advantage of the readings of digits to encode
meaning in a string of numbers.




As a [comment](http://overlordmaruyama.wikia.com/wiki/Bukubukuchagama#comm-
text-8408) pointed out in the wiki page you provided, the words which the
numbers represent seem to be a common thing in hentai games.

**For 19:19** :

> In Japanese when reading the time, or a string of numbers, it is often read
> as if each number is separate, for example, "One Nine One Nine". Doing this
> with 19:19 sounds a bit like " _Iku, Iku_ " which translates to " _I'm
> cumming, I'm cumming!_ ".

**For 7:21** :

> Thanks to [ʞɹɐzǝɹ's](https://anime.stackexchange.com/questions/24048/some-
> kind-of-wordplay-in-overlord/24051?noredirect=1#comment34657_24051) comment
> we now know that it sounds a bit like " _Onanī_ " which translates into
> "onanism" which is a synonym for "masturbation".

These are instances of
[Goroawase](https://en.wikipedia.org/wiki/Japanese_wordplay#Goroawase) word
play in Japanese, which takes advantage of the readings of digits to encode
meaning in a string of numbers.

