"Because she was too damn ugly to kiss goodbye."
This is essentially what happened to the Neanderthals.
The men couldn't bear to kiss their wives good-by when they went on hunting forays, so they took them along.
Some sexually deprived Cro-Magnon males spotted them and used the grocery sacks they always carried to allow them to interbreed without regurgitating.
ROFLMAO!
But did they "double-bag"?
Many thanks for the ping !
Don't forget about that man, in England, whose DNA was the same as the newly found Neanderthal .