Quote:
After millions of years of evolution why do male mammals still have nipples?
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Do you seriously want nipples in males to become extinct?
Besides,
Homo sapiens came into being 400,000 - 250,000 years ago. Not even 1 million years!
Male and female only become different inside the mother's womb at a certain phase of foetal development. Before that they are the same. So, man and woman have the same organs with certain transformations.
Adult Female: fat under nipples
male: no fat, more muscles.
female: Broader pelvic bone for bearing children
male: small pelvis.
Female: ovaries
male: testes (the same homologous organs become ovaries in female and testes in male)
female: clitoris
male: glans of penis
female: Labia majora
male: scrotum
Female: Uterus
male: Prostate gland