Many of us have been there at some time in our lives.
We go out for the night, drink a little too much, and suddenly the world is a better - and better-looking - place.
The slang-term is 'beer-goggles'. And not only do we tend to find members of the opposite sex more attractive, we also find same sex people that way.
A study from Britain took 84 people and analyzed their reactions to members of the opposite sex. Some of the participants were sober, some had consumed alcohol.