I was checking on all this "slave breeding" stuff and I found a source that I think disproves it all. From a play titled "Love on the Plantation"
COLONEL ANGUS (plantation owner) Rufus, come over here boy.
RUFUS: Yes boss?
COLONEL ANGUS: Rufus, I been thinkin', we need some bigger negroes around here so you, as the biggest of my slaves, are hereby ordered to only mate with Ruby, the biggest gal on the plantation.
RUFUS: But boss, I'se mates with all da ladies, you says you wants lots of chillin's don ya?
COLONEL ANGUS: Forget all that boy, I only want big uns!
RUFUS: But boss, my boy Cletus, he the biggest on the farm and he come outa' Clara, and she tiny!
COLONEL ANGUS: You heard me Rufus.
RUFUS: OK boss, you can be shore I'm only gonna breed with Ruby, I'se promise. (wink)
COLONEL ANGUS: Hmmm, I better check with Ruby too.
COLONEL ANGUS: Ruby, I only want you breeding with Rufus, hear me! I only want BIG slaves and you two are the biggest.
RUBY: But Colonel, my biggest boys is with Leroy, and he the smallest one here.
COLONEL ANGUS: Nevermind that Ruby, Rufus only! I don't want any scrawny ones like your Georgie!
RUBY: But Boss, Georgie is yours! And besides I don like Rufus no more.
COLONEL ANGUS: Why not!
RUBY: Last night I caught him behind the shed doin Maurice from behind, YUCK!
[enter the Colonels wife, a huge, ugly, southern belle named Nettie.]
NETTIE: Colonel, what are you up to with the slaves?
COLONEL ANGUS: Uh, honeybud, I'm telling Rufus I only want him to breed with the biggest mammies on the plantation.
NETTIE: Oh well then, (LIFTING HER BLOUSE TO SHOW HER EXPANDING BELLY) Colonel, I got good news for you and I got bad news.....