Does anyone have any Great Danes?

I have a Great Dane/ Black Lab X "Marti", what a big hunnie-bunnie. The biggest, gentlest SUCK I have ever met! My son is 4 years old and weighs about 40 pounds, Martie is 1 year old and weighs about 120 pounds...they play together for hours, running, playing ball, wrestling on the floor...and they both laugh their heads of constantly. Martie even knows how to tickle my son, he gently wiggles his mouth on my sons ribs and my little guy giggles until he is breathless. What a pair...what a great dog!!!!!!