I'm with Mr. Aungst--a bit torn, depending on definition.
If it is a shoot-em-up, gore-filled movie, such as that awful flick "Cliffhanger" from several years back..I'd say definitely not. Kids don't need to be exposed to that kind of violence--it desensitizes them to the concept.
On the other hand, I have no problem with tastefully done love scenes. I continue to feel that society is far too prudish in this respect, and all of the so-called "sex related crimes" are a direct result of unresolved curiosity and being made to feel 'bad' or 'ashamed' of natural things.
Even when my kids were young, I always said that I'd far rather have them witness people making love than shooting each other up.