Porn Makes You Rational

A new paper looking at how testosterone and visual cues affect offers in the ultimatum game can be found here. This article in Nature sums it up:

High-testosterone men fight hardest for a large cut, the researchers found. But the most testosterone-driven men were also the most likely to slacken their cash demands after viewing sexy women. Perhaps they relaxed and began to care less about money. Or perhaps, the researchers suggest, with a 'mate' to impress the men were driven to have some wealth, however modest.

The sight of a potential mate might therefore actually make men more sensible, Van den Bergh says. "Since a few coins is better than no coins at all, men thus become more economically rational after exposure to lingerie or sexy women," he says.

There apparently has also been work which has shown men's rate of time preference changes after seeing "hot" looking women.

Pretty ladies make men want wealth with which to impress, according to a new study - even if they’ll be worse off in the long run.

Psychologists Margo Wilson and Martin Daly at McMaster University in Hamilton, Canada, asked students whether they would prefer, say, $19 tomorrow or $25 next week. They then showed them the faces of ladies whose attractiveness was ranked on the website ‘How Hot Am I?’.

After eyeballing pictures of pretty women, men were more likely to want immediate monetary gratification than to wait for a bigger bonus. Women’s calculations, on the other hand, were unaffected by male eye candy, as were men’s after ogling plainer women or fancy cars1.