I thought it had something to do with the order from the details button, because in my everyone-18-or-older-must-breed village, I had a 14yrold first on the list, so everyone talked to him, but they bred with the 70yrolds. But when the the 14yrold turned 18, the women ditched the other old guy.(I forgot to mention the 18yrold had a pony tail )