Girl Lops Bunnies hump each other?

Question
I just got two lops bunnies and took them to the vet to see what sex they are. They said they were both girl lops. One of the lops is always humping the other- over and over. Does this mean it may be a boy? Help

Answer
Both female and male rabbits will mount other rabbits to show dominance. This is an aggressive behaviour, and it can sometimes be the start of much worse (such as fighting). Getting them spayed when they are old enough will generally always stop the problem.