Say It Isn't So (2001)

  Hey, look, another Christy movie.  They're all kind of clumped together in my To Be Watched queue because I added them all at the same time, around 2014, I think, if you were wondering what year I was up to.

Gilly (Chris Klein) likes his life for the most part, but he is a little lonely.  He has a private investigator (Brent Briscoe) trying to find his birth family but no luck so far.  Then he meets Jo (Heather Graham), a beautiful ditzy blonde who is the worst hairdresser to ever walk Beyoncé's green Earth.  They hit it off and it looks like true love.  But Jo's mother, Valdine (two-time Oscar winner Sally fucking Fields), doesn't want her daughter to end up with a dogcatcher.  She wants Jo to go back to her rich, douchey ex-boyfriend (Eddie Cibrian), so she spins a yarn about Gilly being the baby she put up for adoption years ago.  Disgusted over their accidental incest, Jo and Gilly break up.  Gilly eventually learns the truth and desperately travels to Oregon to stop Jo's wedding.

This movie has precisely one (1) joke and it not only runs it into the ground, it ploughs a field with it and raises county fair award-winning corn.  It's a dumb, crass sex comedy that is clearly aping its betters.  I'm not a fan of the genre in general but I can recognize when one is well done and boy, this ain't it.  It's streaming on Starz currently if you hate yourself.