We all know the "the middle-aged groan." But why does it happen? nyti.ms/3FSXYwn (https://nyti.ms/3FSXYwn)

https://nitter.moomoo.me/pic/card_img%2F1639283779637264386%2FUrqeAb-7%3Fformat%3Djpg%26name%3D800x419

https://nitter.moomoo.me/nytimes/status/1639921401544032258#m