Dzaan and bothrioc have addictive cum, which requires a lot of work to implement properly same as psionics. I'm well aware that those races are not psionic.
As for "planned for a long time", well i planned to get rich by the time i hit 30, and i'm still pretty far from that. You want it in game i do also but unless someone be willing to write a shitload of text for every character it's gonna work on i don't see it implemented in forseeable future. Use your heavy slut ray and pretend your steele is space magician