I watched Xala for my Lit&Cinema class. I liked the book and I liked the movie, the subtitles were hard to read sometimes though.
Oh, straight from Wiki
"Xala is a 1975 Senegalese film directed by Ousmane Sembène. It is an adaptation of Sembène's own 1973 novel of the same name. The film depicts El Hadji, a politician in Senegal, who is cursed with crippling erectile dysfunction upon the day of his marriage to his third wife. The film satirizes the corruption in African post-independence governments couples with extreme penile failure; El Hadji's impotence symbolizes the failure of such governments to be useful at all. The film ranked #83 in Empire magazines "'The 100 Best Films Of World Cinema" in 2010'"
It satirized Western culture too.