Would you like a receipt? http://vklaw.lt/viagra-shop-in-manchester-vjcr sildenafil vs viagra In fact, the two studies are not that far apart, starting with their basic conclusion that male monogamy can be a winning strategy, evolutionarily, and thus be favored by natural selection - the "survival of the fittest" winnowing process that shapes species. Both studies also found that paternal care "is a consequence, not a cause, of monogamy," said Clutton-Brock, but one that made it even more beneficial: with monogamy, males are more likely to help care for their offspring.
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