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@dicklet4incher GTFIH
www.ncbi.nlm.nih.gov
"the effects of prenatal testosterone may in part explain the differences in adult penile length."
JFL @ not making your pregnant wife use libigel. I've said it and will say it before, prenatal testosterone matters ALOT

Second to fourth digit ratio: a predictor of adult penile length
The second to fourth digit ratio (2D:4D) has been proposed as a putative biomarker for prenatal testosterone and covaries with the sensitivity of the androgen receptor (AR). Both prenatal testosterone and the AR play a central role in penile growth. In ...

"the effects of prenatal testosterone may in part explain the differences in adult penile length."
JFL @ not making your pregnant wife use libigel. I've said it and will say it before, prenatal testosterone matters ALOT