You're about the 1,000th guy to post this lol
The best way to 'turn' a wife or gf is to have her actually TALK to black men. Pics and vids don't do anything but make her horny to get fucked by either you or a dildo.
Real seduction happens through a man and a woman.
And, before you say 'yeah but she's really shy but freaky once she gets started'... That applies to all women lol
I've been a First BBC for plenty of single women and couples. I will tell you that 100% of the time I converted a chick, I chatted with HER until she felt eventually comfortable and ready. Once her pussy got wet she was DTF
As compared to talking to the guy... Which usually goes nowhere but endless pics and vids.
Hope this info helps!