I think you're confused about how babies are conceived. It has little to do with brains, and much to do with glands. "Making love with our minds" is a little too New Age for me.
Granted, if two intelligent people breed, maybe the combination of "nature and nurture" will tend to produce an intelligent offspring. But I don't think your choice of Ann Coulter and Michele Malkin has anything to do with their brains, frankly... tell me, would have said that if they looked like Helen Thomas and Hillary Clinton, two very intelligent but not-so-nearly-good-looking women?
See? Glands.