“…In light of the above, what may seem even more surprising is that there is a myriad of studies (but yet, with conflicting results) on the relationship between the digit ratios and numerous psychological, behavioral, and physiological characteristics, for instance sports performance (for a meta‐analysis, see Hönekopp & Schuster, 2010), aggressive behavior (for a meta‐analyses, see Hönekopp & Watson, 2011; Turanovic et al, 2017), grip strength (Fink et al, 2006; but see van Anders, 2007), substance and computer use (Siegmann et al, 2019; but see Borkowska & Pawlowski, 2013), prosocial behavior (Millet & Dewitte, 2006, 2009; but see Brañas‐Garza et al, 2019; de Miranda et al, 2018), sexual orientation (for a meta‐analysis, see Grimbos et al, 2010), number of children (Klimek et al, 2014, 2016; but see Sorokowski et al, 2012), personality traits (Borráz‐León et al, 2019; but see Candelo & Eckel, 2018), risk taking (Barel, 2019; but see Ronay et al, 2018), or handedness (for a meta‐analysis, see Richards, Medland, & Beaton, 2021). These conflicting results draw a puzzling portrait of the digit ratios, indicating that the previously assumed biological mechanism of differences in the 2D:4D may not be clear and straightforward.…”