Why are jounger brothers always taller than the firstborn son?

[midget killer 69]

And the firstborn tends to mog facially and have a higher IQ, it‘s something I‘ve observed.
Has anyone else noticed this? what could be a explenation?

 

[crazyguy]

And the firstborn tends to mog facially and have a higher IQ, it‘s something I‘ve observed.
Has anyone else noticed this? what could be a explenation?

i know why.

 

[midget killer 69]

i know why.

interesting