Having had mainly bitches in the past I've always been told and believed it to be down to dominance, though two of my girls had other 'funny' preferences. Myshkha; if you were tickling or strocking her tummy would gradually try and nudge your hand towards her vulva- I kid you not- and her daughter would very often begin licking to clean herself then, well shall I say she would get a little excited. Hope Rosie doesn't go down that road.
