Unknown to the participants, everyone was offered a fictitious candidate partner who had been tailored to match their interests exactly. The photograph of “Mr Right” was the same for all women participants, as was that of the ideal women presented to the men. Half the participants were told their ideal mate was single, and the other half that he or she was already in a romantic relationship.

“Everything was the same across all participants, except whether their ideal mate was already attached or not,” says Burkley.

The most striking result was in the responses of single women. Offered a single man, 59 per cent were interested in pursuing a relationship. But when he was attached, 90 per cent said they were up for the chase…

Burkley and Parker speculate that single women may be more drawn to attached men because they’ve already been “pre-screened” by other women and found to be satisfactory as a mate, whereas single men are more of an unknown quantity.