[Jeff Head]

detailed and blunt discussion of hard, real, nasty consequences is, IMNSHO, more routinely effective.

Agreed! 1000%!

And that is exactly what this presentation does. Please get one if you can.

[King Prout]

so, then, I assume you do go into what happens when widespread promiscuity is practiced for several generations?
Widespread illegitimate pregnancy and bastardy is a concommitant.
Widespread ignorance of paternity follows suit.
Widespread accidental incest becomes almost as common as the illicit sex itself.
Bastard results of said incestuous couplings between demisiblings leads to fixation of survival detriment recessive alleles, widespread throughout the promiscuous demographic.
Genetically inherited diseases or genetically-caused conditions become prevalent.
These are known facts.
Do you make this abundantly clear?