[jpsb]

The only thing that could stop male human from having sex with female neanderthals is male neanderthals. Unless the females were get down ugly even by cave man standards with I seriously doubt. And that is a dido for neanderthal males and human females. If the two speices could breed they did. And that's a natural law.

[jas3]

I hardly think it necessary to bring the singer Dido into this debate.

jas3

p.s. You also wrote "with" instead of "which".