What is it with movies that they only become popular if as little original as possible? The Porky's series have, for some reason, reached an enormous popularity, while they were more than highly influenced by far superior productions made years before them. Lloyd Kaufman's SQUEEZE PLAY (1980) and WAITRESS (1982) both appeared before the first imitation in the Porky series (1982), and although they had reasonably successfull theatrical runs, they somehow didn't come to be as well known as the rip offs. And more of Lloyd Kaufman's brilliance was made in 1983 (STUCK ON YOU and THE FIRST TURN-ON), but these much better titles also didn't reach the kind of audiences that later and even weaker Porky titles did.
If you like the Porky films I am sure you will absolutely love the films that inspired these series, and suggest you check them out as well! All are available on DVD. From Troma,of course!