Is it normal to want a bareback baby?

I really want to have sex with some well-off woman, even a married woman, get her pregnant, let her and hers raise the child - and go my separate way.

I'd get a vasectomy very shortly after, because I want to pass on my genes, not have a child in my life. I feel sperm donation is a terrible long shot and "lesbian I know well with a wish and a turkey baster" doesn't seem quite the same.

Is this at all normal?