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TRUE FACT: Male sperm (Y) swim faster and die sooner than
female sperm (X), because female sperm contain
heavier genetic material, which slows them down
but allows them to live longer.

THEREFORE: Males with longer penises tend to produce more
male offspring because they deposit the sperm
closer to the egg and Y sperm cells win the
"sprint." Males with shorter penises tend to have
more female offspring because sperm is deposited
further from the egg, Y sperm die off thus
allowing X sperm to win the "marathon."

CONCLUSION: Look at your family. This tells you whether or
not your father had a big cock.

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