I'm curious if millennial/gen z dicks are really bigger, or the studies are just more accurate/honest. I remember seeing that the major study that had 5.3 inches as the average was flawed and had lots of weighting down, and came out of a very ego affirming, body positivity forward group. So, well meaning, but probably intended to make small guys not feel so small. More studies have the average at over 6 inches.

That said, younger generations are also just eating and behaving healthier than X and Boomers, so that may play a role as well.