The initial design supposes one redheaded women has actually an average of high sexual attention and you may sexual hobby than simply low-redheaded feminine due to particular molecular system one to impacts the expression from purple tresses in females and their sexual decisions. This has been shown that ladies with a high 2D:4D little finger proportion, and this means connection with an advanced out-of prenatal the hormone estrogen (Manning et al., 1998), declaration highest sex drive, highest sociosexual focus, and much easier attainment from sexual adventure (Manning and you may Fink, 2008; Varella ainsi que al., 2014). As purple hair colour seems to can be found more frequently into the female compared to dudes (Shekar et al., 2008; Frost ainsi que al., 2017; Flegr and you will Sykorova, 2019), Frost et al. (2017) recommended one to prenatal estrogen, that’s particular in order to female advancement, results in the expression off red-colored tresses during the prenatal invention and you can is accountable for the brand new sex difference between the fresh new regularity out-of redheadedness. On the other hand, a survey by Voracek et al. (2007) discovered that prenatal estrogen, once the indirectly conveyed by 2D:4D hand ratio, wasn’t associated with mild hair tone. Nevertheless, one study did not examine a connection anywhere between estimated prenatal estrogen and you can red-colored hair colour specifically, as purple locks color are addressed simply as among the dark shade away from tresses. Читать далее →