Male sperm(to be called as 'Y') swims faster and dies sooner than female sperm(to be called as 'X'), because X contains heavier genetic material, which slows them down but allows them to live longer.
Thus, males with longer penies tend to produce more male offspring because they deposit the sperm closer to the egg and Y wins the 'sprint'.
Males with shorter penies tend to have more female offspring because sperm is deposited further from the egg, allowing X to win the 'marathon'.
Look at someone in your family or among your friends.
This tells you whether or not he had a big cock.
Thus, males with longer penies tend to produce more male offspring because they deposit the sperm closer to the egg and Y wins the 'sprint'.
Males with shorter penies tend to have more female offspring because sperm is deposited further from the egg, allowing X to win the 'marathon'.
Look at someone in your family or among your friends.
This tells you whether or not he had a big cock.
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