In his book Insatiable Wives, psychologist Dr David Ley outlines the possibility that watching your wife with someone else will turn you on so you can compete and 'beat' their sperm for fertilisation ('This fantasy has been around as long as marriage and sexuality,' he says, pointing out that references to the kink have existed since the 13th century.
Why would someone be into cuckolding? As with any sexual fetish it's hard to pin down one particular reason, but psychologists have suggested that sexual jealousy - and getting aroused by it - might be linked to biology. In November the Independent reported reported that Google searches for 'cuckolding' hit a peak, and according to Google Trends, the UK is second only to the Netherlands in searches for the kink. Sound like your worst nightmare? Not everyone agrees. At the most basic level, a cuckolding fetish is about a guy getting turned on by his wife or girlfriend sleeping with someone else.
