❓ why
Why do men have nipples?
human bodybiology
Quick Answer
All embryos follow the same body plan early on, and nipples form before sex differences develop.
The Full Story
For the first several weeks of development, male and female embryos look essentially the same. Nipples and milk lines form during this shared stage. Only later do genes on the Y chromosome and hormones such as testosterone steer development toward male features. Since male nipples cause no harm, evolution has had no reason to remove them.
Key Facts
1.Men can develop breast cancer; about 1% of breast cancer cases occur in men.
2.Men have a small amount of breast tissue behind the nipple.
3.Some people have extra 'supernumerary' nipples along the milk lines.
YouTube Angle
Suggested video title for this topic:
"Why Men Have Nipples — Embryology Explained"