Jazz is 4 months old, and likes nothing better than humping my arm. If i ignore her, then she seems a little on the agressive side, but i say no sharply and get up and walk away from her.
I am amazed that 'bitches' do this, I thought it was a dog thing. I do thinks its to do with hormones, and shes still very young, so i would expect it whilst shes still youngish.