Farmer's daughter syndrome is what girls have when they are prevented from getting attention from guys while they are growing up. This causes them to act "easy" or "desperate" since they have no relationship experience and will make them fall in love with the first man they come across. Attractive women of this nature are common in guy's fantasies, but rare in real life.
Guy 1:I was out in rural Wyoming last week and slept with this girl who acted like she's never seen a man in her life. It was awesome.
Guy 2: Dude she totally had Farmer's daughter syndrome.