But first, half of the men were shown sexual cues of some kind.
One group of 44 men were given pictures to rate; some were shown landscapes while the rest were shown attractive women.
Another group, of 37 men, were either asked to assess the quality, texture and colour of a bra or a t-shirt.
And a third group of 95 were shown either pictures of elderly women or young models.
Each group was then paired up to play a game where the men had $10, a proposer had to suggest a split, and the other man accepted or rejected the offer.
If the second man accepted the offer, the money was distributed in agreement with the offer. If he rejected it, neither partner got anything.