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The study published yesterday in the journal Current Biology said that howler monkeys with deep roars — used to attract females, deter love rivals and scare off predators — tend to also have smaller testicles and a shortage of sperm compared to their peers.
Dr. Dunn proposed:
“It may be that investment in developing a large vocal organ and roaring is so costly that there is simply not enough energy left to invest in testes.
“Alternatively, using a large vocal organ for roaring may be so effective at deterring rival males that there is no need to invest in large testes.”
And find fat, drug using girlfriends to ride along with them.
Most of the girls I see in those trucks are kind of skinny. I think it's the meth.
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