From Behind (1999)

Original title: Le derrière

Frédérique's mother has died recently leaving her the family stud farm. She's never met her father, doesn't even know his name. But she finds it on the back of an old photo. She sets off for Paris. She stays with her gay dancer pal Marc. Marc and friends decide to go to their favourite gay bar... but it's men only. So Frédérique becomes Frédéric, an effeminate gay boy... Frédérique follows her father. Pierre Arroux is an art curator - and gay. She introduces herself to him, but as Frédéric. So while Frédéric is quite an awkward young man and an embarrassment to his father, Frédérique is secretly meeting with her old boyfriend now living in Paris..