The region with greatest sweat gland density is the palms and soles of the feet, which contain 600–700 sweat glands/cm².

#science #sciencefacts #sweatglands #feet #hands #palm #sole

So maybe our sweat glands play a role? But I am not sure how many sweatglands there are the sole of the foot or the skin of the penis, so I suspect it is only part of the story.
#DupuytrenContracture #proteome #SweatGlands
https://www.mdpi.com/1422-0067/24/2/1081/review_report
IJMS | Free Full-Text | Proteomic Analysis of Dupuytren’s Contracture-Derived Sweat Glands Revealed the Synthesis of Connective Tissue Growth Factor and Initiation of Epithelial-Mesenchymal Transition as Major Pathogenetic Events