Cougar -- a term for women over 40 who like to have sexual relations with younger men now has a scientific backing to it. A new study has revealed that cougars are biologically driven rather than by lust to select a younger male partner for them. The study has revealed that women over 40 who have in-vitro fertilisation are far more likely to conceive with a much younger man because young sperm 'corrects' their old eggs while the same applies for older men choosing young 'trophy wives' - whose young eggs correct defects in old sperm Stuff.co.nz reported. Researcher Michael
