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Gaydar really exists: Scientists prove gay people are more able to pick out fellow homosexuals (Fiona Macrae, 27th May 2010, Daily Mail)

Our brains are wired to take in the bigger picture, meaning that if we are shown a square filled with rectangles and asked what is inside, we can easily be fooled into saying 'squares'.

When the men and women were asked similar questions, the heterosexuals replied more quickly but were less accurate, the journal Frontiers in Cognition reports.

The homosexuals took longer but got more answers right, particularly when asked about the smaller shapes, suggesting they were able to see the small details as well as the bigger picture. [...]

Adopting such a perceptual style presumably increases the likelihood of detecting perceptual clues indicative of homosexual orientation, which facilitates finding like-minded social peers and potential friends and sex mates.

Differences in attention to detail have previously been shown among religious groups, with Italian Roman Catholics looking at the bigger picture more than those with secular views and Israeli Orthodox Jews paying less attention to detail than Israeli non-believers.