Dr Rahman has tested hundreds of gay and straight volunteers and discovered key neurological patterns that he believes reveal if a person might have been born gay or straight.

Mr Birch took part in the computer-based tests to see if it suggested he had actually been ‘born gay.’ They revealed on half of the test Chris performed in the ‘expected direction’ for a gay man but the other half suggested a straight man. Dr Rahman suggested his homosexual feelings may have lain dormant but been brought to the surface by the stroke.