<p>This seems to be a play on the psychological trick of "counting to 10".<br>
Counting to 10 (or more) is a methodology often used to help people with anxiety, fear, anger and in the case or R-15, arousal. </p>

<p>By counting to ten, you actively keep your mind busy, effectively distracting you from whatever is causing your anxiety, fear etc.</p>

<p>In R-15 instead of counting to 10 however, Ritsu Enshū (円周 率 Enshū Ritsu) recites π. As he is regarded as a genius mathematician, it makes more sense that reciting π would be more mentally challenging for him, then counting to 10 would be. And thus be a more effective way of distracting him from his arousal. </p>

<p>According to the <a href="https://en.wikipedia.org/wiki/R-15_(novel_series)" rel="nofollow noreferrer">wiki</a> page, it is also a clever play on his name, as this supposedly means π. </p>

CC BY-SA 4.0
2019-09-06T11:59:34.200Z
2019-09-06T11:59:34.200Z
Dimitri mx
<p>I know that some characters recite pi digits to either calm themselves, or to distract themselves. I remember a particular case in the series <a href="/questions/tagged/r-15" class="post-tag" title="show questions tagged &#39;r-15&#39;" rel="tag">r-15</a>.</p>

<p>Is there any particular reason it is pi?</p>

<tropes><r-15>
Why do characters recite π (pi) to distract themselves?
# Why do characters recite π (pi) to distract themselves?
Posted by: username_0 on 2019-09-06
I know that some characters recite pi digits to either calm themselves, or to distract themselves. I remember a particular case in the series [r-15](/questions/tagged/r-15 "show questions tagged 'r-15'").

Is there any particular reason it is pi?
**Tags:** tropes r-15
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## 1 answers
### Answer by username_1 on 2019-09-06. Score: 2 | Accepted answer
This seems to be a play on the psychological trick of "counting to 10".  
Counting to 10 (or more) is a methodology often used to help people with anxiety, fear, anger and in the case or R-15, arousal.

By counting to ten, you actively keep your mind busy, effectively distracting you from whatever is causing your anxiety, fear etc.

In R-15 instead of counting to 10 however, Ritsu Enshū (円周 率 Enshū Ritsu) recites π. As he is regarded as a genius mathematician, it makes more sense that reciting π would be more mentally challenging for him, then counting to 10 would be. And thus be a more effective way of distracting him from his arousal.

According to the [wiki](https://en.wikipedia.org/wiki/R-15_(novel_series)) page, it is also a clever play on his name, as this supposedly means π.
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