Kenny Kunene and DJ Fresh to discuss their sex lives

Controversial businessman Kenny Kunene and 5FM's DJ Fresh will shock television audiences this week with explicit details of their sex lives.

On her talk show, Redi on Mzansi , on DStv's Mzansi Magic channel, Redi Tlhabi quizzes the two celebrities, and award-winning actor Sello Maake ka-Ncube, about their sexual behaviour.

Tlhabi's men and sex-themed show also features urologist Shingai Mutambirwa, who ge ts the three celebrities squirming in their seats when he talks about sex topics such as the differences between men and women's sexual organs, premature ejaculation, and the importance of being screened for prostate cancer.

Mutambirwa says prostate cancer - which is uncommon in men under 45 but more prevalent among older men- is the "commonest [sic] site for cancer in men after skin cancer".

Though Kunene and DJ Fresh, whose real name is Thato Sikwane, are not over 40 and not at risk, 51-year-old Ka-Ncube says he has never had a prostate cancer screening.

Mutambirwa prompts giggles from the men when he explains the procedure for examining patients for prostate cancer.

When they are asked about their sexual prowess, there i s no stopping the three celebs.

Kunene, who owns ZAR nightclubs in Johannesburg and Cape Town, says his penis is called "Hugh Hefner" because "it goes on and on and on until it's 80".

Sikwane, who calls his penis "Jimmy", says: "You hear of married couples who have sex once or twice a month, which is sad. It's reasonable [to have sex] at least once a day - even if you've fought.

"That's the best sex on the planet - after a fight," he adds.

The unmarried Ka-Ncube shies away from most of the awkward moments, saying he does not have a wife and cannot attest to Sikwane's statement.

The three, who are all fathers, also speak about how it is off-limits in black households to talk to children about sex.

But Kunene says he has travelled to schools across South Africa with business partner and friend Gayton McKenzie to teach teen girls about abstaining from sex.

Redi on Mzansi is on Mzansi Magic on Thursday at 7.30pm.