Your tiny 4'10" wife who weighs all of 90 lbs. was always curious about sex with white men. You told her you could arrange something like that if she were serious.
Her: "What would I have to do"
You: "It's up to you but you know the white guy is going to want to fuck you".
Her: "If I did that, what if I didn't want him to use a condom. Would you be oaky with that"?
You: "Of course but I'd want to film the session".
Well, you made it happen. That weekend at a hotel you planned everything. Your wife road white cock for the first time. You were surprised when they made-out a little, your wife's arm around the stranger, her leg lifted high so he can get a deep fuck going. After a few minutes you heard the white guy say, "I'm going to cum in you baby". Your wife said, "Go ahead, I can't get pregnant".
This blew your mind because you realized your wife just wanted to have the encounter as bragging rights, or accomplishments, or something that was on her bucket list. She just wanted to be able to say, 'a white guy came inside me'.