If you don't want to assume, here is the section from Wong 2021:
>While we did not find any group difference in the experience of playing with toys without genitals in childhood, the frequency of playing with such toys is associated with erotic attraction to castration for the Interested and Wannabe groups. These findings suggest that childhood play with male toy figurines lacking genitalia might potentially contribute to BIID, which for some individuals may fulminate as extreme castration ideations and ultimately genital ablation. Such an impact from toy play resembles other study findings (Fernandez & Pritchard, 2012; Galioto & Crowther, 2013) that exposure to slender and muscular models may lower body satisfaction and motivate body modification for males, in parallel with the Barbie doll syndrome for girls (Dittmar et al., 2006). Yet it should also be noted that there was a higher proportion (59% vs. 45%) of individuals in the Castrated group, who never played with male figurines, than in the Wannabe group. These results indicate that play with male genital-less toys may be significant for some, but not all, in contributing to extreme castration ideations.
>While we did not find any group difference in the experience of playing with toys without genitals in childhood, the frequency of playing with such toys is associated with erotic attraction to castration for the Interested and Wannabe groups. These findings suggest that childhood play with male toy figurines lacking genitalia might potentially contribute to BIID, which for some individuals may fulminate as extreme castration ideations and ultimately genital ablation. Such an impact from toy play resembles other study findings (Fernandez & Pritchard, 2012; Galioto & Crowther, 2013) that exposure to slender and muscular models may lower body satisfaction and motivate body modification for males, in parallel with the Barbie doll syndrome for girls (Dittmar et al., 2006). Yet it should also be noted that there was a higher proportion (59% vs. 45%) of individuals in the Castrated group, who never played with male figurines, than in the Wannabe group. These results indicate that play with male genital-less toys may be significant for some, but not all, in contributing to extreme castration ideations.