1. なぜお玉を「お玉」という？
2. 男の人にヒゲが生えるのはなぜ？
3. SNSで見かける「＃」この記号ってなに？

• お玉はもともと杓子と呼ばれていた。かつては、ひょうたんを半分に切ったものや、木を彫ったもので食べ物をすくっていた。
• 弥生時代、稲作が始まって以降、米のことを「稲魂（いなだま）」と呼んだ。それをすくう杓子は、魂を入れる杓子という意味で「お魂杓子（おたまじゃくし）」と呼ばれるようになった。但し、その段階では、杓子の呼び方は地方によってマチマチであった。
• 滋賀県・多賀大社の「お多賀杓子」が、坊人【多賀大社境内にあるお寺の僧】が「お伊勢参らばお多賀に参れ　お伊勢お多賀の子でこざる」という「CMソング」とともに全国に広まった【多賀大社は伊勢神宮の親神様にあたる「伊邪那岐大神（いざなぎのおおかみ）」と「伊邪那美大神（いざなみのおおかみ）」を祀っている】。
• 「おたがじゃくし」が「おたまじゃくし」に変じた原因は不明。番組では、「おたまじゃくし」のほうが言いやすかったためと推察していた。

The results of this study are consistent with the suggestion that the sexually dimorphic facial hair of humans may have evolved in response to selection on male?male fighting performance. Similarly, although not tested here, our results also support the suggestion that the mane of male lion’s provides some level of protection from injury when males fight (Darwin 1871; West et al. 2006; Blanchard 2010) due to the capacity of hair to slow and expand the area of energy transfer. As mentioned in the Introduction, male beards are one of the most sexually dimorphic features of human anatomy (Darwin 1871; Dixson et al. 2018). Men with full beards are perceived as being more masculine, socially dominant, and behaviorally aggressive in comparison to clean-shaven men (Neave and Shields 2008; Dixson and Vasey 2012; Dixson and Brooks 2013; Saxton et al. 2016; Sherlock et al. 2017; T?ebicky et al. 2019). Additionally, facial hair has been shown to positively impact mating success in highly competitive environments (Barber 2001; Dixson et al. 2017). These observations are all consistent with the hypothesis that beards evolved to enhance fighting performance by providing protection to vulnerable aspects of the face. Indeed, aspects of the anatomy of the human facial skeleton, and sexual dimorphism in facial shape, have been suggested to have evolved as a result of male?male contest competition, and act to protect the face against damaging strikes (Puts 2010; Stirrat et al. 2012; Carrier and Morgan 2015; Puts et al. 2015).