Freaky Fucking Friday (2008)

Part 1: Our hero falls down the stairs together with a beautiful Japanese teenager. He wakes up in her body. He goes to his room and starts exploring his new body. He finally ends up in bed with a photographer. He is adapting surprisingly well to a life as a cock sucker. Part 2: Our hero ends in bed with the photographer's jealous girlfriend. A lot of lesbian sex. Part 3: In the final part he decides to seduce his Japanese friend, who is now in his body.