I hope you don't mind if I tell about my RB dog... At first he did it like girls, but once, I was having a walk with him and with a friend of mine. Her male dog peed by lifting his leg and my dog was so amazed because of this and stared at him. After he was finished, my dog tried it too, and he fell over Ok, that was hilarious, we coulnd't stop laughing, but my dog wasn't too impressed, so he tried again, and succeeded that time. He looked SO proud, and after that, he always lifted his leg.