Might I suggest not involving any type of pornography to your wife soft core or otherwise?
I myself really dislike pornography and just never felt the interest that say my husband does. Instead, you might try books (of which there are plenty) that have black male leads that romance white women.
Also, if your not doing your homework in the bedroom, enticing her with lingerie, toys and whathaveyou, your going to get a very poor response from your wife anyway.