Show me where this is known. East asians most by far. Europeans next. Africans least. And everyone else in between. Europeans selected for more feminine traits resulting in thinner skin and the diversity of hair and eye color. But by every measure, of which testosterone (and penis size) is the most obvious, whites are second to east asians in neotenic (pedomorphic) selection.
https://www.quora.com/Which-ethnic-group-among-Caucasoid-is-the-most-neotenic