I think the last time we tried to take a newborn kid to see a movie it was Million Dollar Baby. It felt awkward and depressing as hell, and I was only too glad to take the kid out when she started wailing. Ultimately, it wasn't the mom-demo-heavy movie selection, or the "Mommy & Me" branding that turned me off: it was all the other peoples' kids. So noisy.
Anyway, if you took your kid to the Landmark Sunshine Cinema's Rattle & Reel screening this morning of Lars von Trier's explicit Shia Labeouf vehicle Nymphomaniac, I'd be slightly interested to hear how it went.
And if you could get in touch again in 15-20 years, I'd love to hear if the experience left any discernible psychosexual scars on your infant child.