if anyone has a lot of patience here is a forum which may or may not shed some light on it...
http://www.sciforums.com/showthread.php?t=57867&page=13
of interest so far:
* theory of scarce resources (rather than heat) may explain any geographical differences in penis size. the theory is that a large penis requires a larger amount of resources (energy i guess) and that in regions where resources are scarce, smaller penises will be favoured as part of evolution. (some controversial discussion regarding difficulty of terrain/scarcity of resources leading to larger brain size (to deal with difficult terrain) leading to smaller penis size (as larger brain takes resources).
* theory of penis as a 'heat exchanger' generally found not credible. would explain why indians in a hot climate allegedly small penises.
* theory of penis shape designed to shovel out other mens sperm (explains the thrusting before ejaculation apparently). the more unfaithful the women are, the larger the penis tends to be apparently.
all food for thought...
http://www.sciforums.com/showthread.php?t=57867&page=13
of interest so far:
* theory of scarce resources (rather than heat) may explain any geographical differences in penis size. the theory is that a large penis requires a larger amount of resources (energy i guess) and that in regions where resources are scarce, smaller penises will be favoured as part of evolution. (some controversial discussion regarding difficulty of terrain/scarcity of resources leading to larger brain size (to deal with difficult terrain) leading to smaller penis size (as larger brain takes resources).
* theory of penis as a 'heat exchanger' generally found not credible. would explain why indians in a hot climate allegedly small penises.
* theory of penis shape designed to shovel out other mens sperm (explains the thrusting before ejaculation apparently). the more unfaithful the women are, the larger the penis tends to be apparently.
all food for thought...