Requirements to be a sperm donor are very strict -

RMQualtrough

kiwifarms.net
My genes are absolutely unfit for replication. Shame, since both of my parents were good looking... There's still a dice roll where a hot guy could have a fug baby.
 

Sweet Yuzu

NOT A SHARK I SWEAR
kiwifarms.net
The diffrences in sperm vs egg viability were established long before humans ever even became a species and the onset of menopause seems to have developed sometime when mammals first became a thing. And no, men are not magical either- their fertility decreases with age, the quality of their sperm decreases with time, and you really shouldn't be having kids after your mid 30s regardless of your sex. You're spouting a bunch of junk popscience.
I thought only humans had menopause? Agree with the rest though.
 
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