My wife has no idea.
I'm a happily married male, and have been for 6 years since I met the girl of my dreams my junior year of college. Before my wife and I started dating, I had a black roommate named Leon. Leon and I were randomly paired up our freshman year, and became very close friends. One night, Leon and I got drunk in our dorm, and somehow ended up watching porn and masturbating together. (Mind you, prior to this, I've never had ANY homosexual desires, or done anything like this.) Maybe it was the alcohol, but the next thing I remember was seeing an opened bottle of KY lube on the floor, me on all fours in a desk chair with Leon inside of me. It was literally euphoric. We never kissed, never did anything passionate at all. We would never even discuss it afterwards. He'd finish, I'd go take a shower, come back and hang out as if nothing happened. This happened, on average, 3 times a week.
Six years and two beautiful kids later, we rarely ever have sex. Even though I never penetrated Leon, just the feeling of him being inside me gave me some of the most powerful orgasms I've ever experienced. I "messed around" with several girls in my life, and have had some great sex, but I'd give anything to feel Leon's cock deep inside me again.
I assure you Leon thinks about, too.
I would love it if my husband brought a big black cock home for me. I would also be so turned on watching my husband getting a big black cock up his ass. Sounds like a no brained. Send the kids to Grandma for the weekend and let the fun begin.
Invite Leon over to meet your sex starved wife. You both might get satisfied.