A man is dating three women and wants to decide which to marry. He decides to give them a test. He gives each woman a present of $5000 and watches to see what she does with the money.

The first does a total make-over. She goes to a fancy beauty salon, gets her hair done, new make up and buys several new outfits and dresses up very nicely for the man. She tells him that she has done this to be more attractive for him because she loves him so much. The man was impressed.

The second goes shopping to buy the man gifts. She gets him a new set of golf clubs, some new gizmos for his computer, and some expensive clothes. As she presents these gifts, she tells him that she has spent all the money on him because she loves him so much. Again, the man is impressed.

The third invests the money in the stock market. She earns several times the $5000. She gives him back his $5000 and reinvests the remainder in a joint account. She tells him that she wants to save for their future because she loves him so much. Obviously, the man was impressed.

The man thought for a long time about what each woman had done with the money, and then he married the one with the largest breasts.

Everyone looks better after you’ve tipped back a pint or two, and now we may know why.

It turns out that alcohol dulls our ability to recognize cockeyed, asymmetrical faces, according to researchers who tested the idea on both sober and inebriated college students in England.

“We tend to prefer faces that are symmetrical,” explained Lewis Halsey of Roehampton University in London. That’s well established by previous research, he said.

To find out if alcohol interfered with the ability to distinguish faces where the left and right sides were uneven, he and his colleagues designed an experiment involving images of faces that were tinkered with to make them perfectly symmetrical or subtly asymmetrical. The results of the study were published by Halsey, Joerg Huber, Richard Bufton and A.C. Little in a recent issue of the journal Alcohol.

“Over an evening Joerg, Richard and I went out to the university campus bars with a laptop and asked students to participate,” Halsey said.

This included students taking a quick breathalyzer test to confirm their alcohol consumption. The students were classified as either sober or intoxicated, then examined the images.

Twenty images of a pair of faces — one symmetrical, the other asymmetrical — and then 20 images of a single face were shown, one at a time, to 64 students. Participants were asked to state which face of each of the pairs was most attractive. They also had to determine whether each of the single faces displayed was symmetrical.

The sober students had a greater preference for symmetrical faces than did the intoxicated students. And it turned out that the sober students were better at detecting whether a face was symmetrical.

What’s more, the data suggest that men were less prone to losing their symmetry-detecting ability when intoxicated than women, which was unexpected, Halsey said. The difference probably has something to do with the tendency for men to be more visually oriented and more stimulated by what they see, he said.

“Men tend to ogle more than women do,” Halsey ventured.

The results add a new twist to ongoing research in this area, according to psychologist Benedict Jones of the University of Aberdeen.

“People in the past have compared attractiveness judgments of faces… to show that small amounts of alcohol see subjects give faces higher attractive ratings,” said Jones.

Some researchers have suggested that this might be because people become better at detecting beauty or simply become a bit less picky.

Halsey’s findings come as a surprise, said Jones, because the difference in ability between males and females was not seen in other studies where people looked at symmetry detection.

“Those studies were conducted in the lab though,” said Jones. “It’s possible that these new data show this sex effect because people were tested out in the community, and men and women respond in slightly different ways to that.”