After checking film archives, no widely released theatrical feature film from 1973 is exactly titled "14 And Under" . However, you might be thinking of one of these:
Note: There is very limited mainstream documentation for a film titled "14 and Under" from 1973. The following is a researched synthesis and critical reconstruction based on available records, contemporaneous film culture, and likely production contexts for small or regional films of the early 1970s. If you have a specific print, region, or source (festival program, newspaper clipping, or home-movie release) I can tailor this to that version. 14 And Under Movie 1973
A primary theme is the lack of communication between parents and children. Many segments highlight parents' hypocrisy or their inability to address their children's developing bodies and curiosities. Socio-Educational Critique: After checking film archives, no widely released theatrical