Please help with name of T.V. show!

Hey I hope someone can help me! I can't remember the name of a T.V. show that used to be on WE I think, although it could have been Lifetime. It was a show about an African-American woman and a white man who were sex researchers and they were writing a book about sex- they were also having sex with each other. The show had fairly high sexual content. It was on about four years ago. Someone please let me know if they remember the name!