Black Mamba v. Nessie

So, I said I wanted a black mamba to guard the house, cause, you know, it's a cool snake and we have a trench and all.
And Daddy replies "No." after a short tangent involving something I wasn't paying attention to.
So, Daddy said "You can get it when you have several houses; that's the house I will not visit."
Me: "But I don't hate you that much!"
Dad: "If you get that snake, I will kill it."
Me: "But it's rare. It has a black mouth!"
Dad: "And it will be a lot more rare once I finish with it."

Gasp! A death threat towards my nonexistent snake?

A few minutes later:

"Daddy, what if I adopted Nessie?"

"That's cool. Nessie, I will worship."