Here's something...
If it all started out with two people, disregarding Lilith, 'cause discussing her would make us BAD BAD Christians, then we are all incest.
Adam and Eve bump uglies, and then they have children.
Their children BUMP UGLIES!? :O
AND THEIR CHILDREN!
So then we have like...
Well...Adam would be someone's great uncle and grandfather at the same time. O_O And there would be freaky looking deformities and such.
Same with that bottle-neck shit. Explaining similar features in a race. INCEST!? I dunno. Point is...like...I don't think I have one.
If creationism were true, more than two flippin people were made.