shes just saying that to keep you happy , scientific testing has proved otherwise , in a recent study women were shown computer generated imagines of men with varying size of equipment and nearly all the women chose the guy with the big cock lol
scientists think this maybe why humans have evolved with relatively large penises compared with other primates etc
https://www.google.co.th/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=women%20prefer%20men%20with%20larger%20penises