"Poetry" joke

Two friends, a white guy and a black guy, both work together. The white guy came in late one morning and his black friend asks where he had been.
The white guy says, "My wife gives me good sex every night and she kept me up really late last night."
The black guy says "I can't get my wife to have sex with me, no matter what! How do you do it?"
The white guy says, "I read her poetry every night."
His black friend then asks, "What kind of poetry?"
The white guy replies, "Blondie, blondie, eyes so blue, how I want to make love to you." Then the white guy tells his friend to go home and try it - it's a sure thing!
The next morning the black guy was about 2 hours late. When he comes in, he has a black eye and his arm is in a sling.
The white man asks, "What happened?!"
The black man says, "Man, don't ever speak to me again!"
The curious white man asks, "Well, what did you say to her?"
The black man replies, 'Nappy head, nappy head, eyes like a frog, bend over bitch, and take it like a dog!!"