Step by step, researcher looks for sexuality clues

[LostInTime]

CNN Health
By Elizabeth Cohen

Can you tell whether someone's gay just by the way he or she walks?

David Sylva wants to know. He straps bright red lights to people's bodies and videotapes them walking in the dark. He then shows the videotape to observers (who won't be biased by clothing or hairstyles since the walker is in the dark) and asks them to guess the walker's sexual orientation.