I was thinking, there's not much weight when it comes to simple forced sex and if you hear if specific NPCs would pass on extra rare skills to the species if they had a child with that character then their next incarnation would be a little stronger when they use their sex skills. racial trait example:

Leviathan Brother of the Sea Witch, Race Deepone: Inherited Skills, Thorn Scale Armor, increases defense, causes damage and poisons everyone who tries to rape her in her awakened form and grip of the scales to be able to hold weapons and clothing in this form without being just relics.

Hastur son of the Fortune Teller Race Abomination: Inherited Abilities, Parasite Control, everyone who tries to rape her will be infected by a potent parasite mindless zombies about to turn higher grade abominations a troi horse to destroy a city.

Mickey brother of Gray Rat Race Moot: Inherited Skills, Adrenaline Surge, doubles defensive skills becoming a pseudo-Indestructible, converts damage into SP perfect for dealing with waves of enemies.

Simon Cousin of Milo Race Human: Inherited Skills, Damn Luck increases the drop of good things in combat food weapons, opponent money and the hit kill rate per hit.