I've seen the movies, probably at an age that I shouldn't have. I was rather young, and let's face it - there were some scenes that your average elementary school student shouldn't have seen. I didn't even understand half of the movie, but little scenes through the series such as "GET IN MY BELLY!" and the many fembots through the series.
Once you actually know what the majority of the references are that are made in the movies, it is obviously much more humorous. They are a fun series to watch, especially if you get a chuckle out of those every now and then sexual jokes.