[beezdotcom]

This could be explained if Neanderthal women were exceedingly unappealing, and the only interbreeding that took place was between Neanderthal men and HS women.

Or...if Neanderthal women were GORGEOUS, and HS men killed all the Neanderthal men to take them...but the Neanderthal women decided to kill themselves rather than mate with HS.

Hey, it's another view...

[beezdotcom]

eh, I forgot to add the "Florence Nightingale Effect" explaining the mating of a few HS women with the surviving N. males they were helping...but I think you got the general (useless) drift...