A rotweiller? Oy. I really don't like those dogs.
Been bit by one, (probably more of a warning bite in his/her mind,) and I had the misfortune of figuring out how dogs do it through a couple of them.
I was just riding my bike past this house, when I see these two rotties, one on top of the other. The one below seems perfectly okay with this, despite normally being quite ornery. I spend a minute or two trying to figure out what they're doing, when it hits me: They're making more Rotweilers! Arrggghh!
Okay, I was not the fastest mind of my generation, I admit it.