"Without speaking or kissing, they had sex, during which she growled like a dog."by Nigel Watson from Fortean Times at UFOcaseook.com (thanks skyblue101!)
"Whatever the genesis of such reports, we have to consider that folk have reported sexual contact with all manner of supernatural beings throughout history. Either the aliens have been conducting their beastly experiments for millennia, or such stories meet some deep-seated socio-psychological need. Until any solid medical evidence is provided, the latter hypothesis seems the more likely."