what is the secret?

some of you I'm sure I've heard of this movie this phrase and you may have even seen it. my first husband was into campy B grade movies from the '60s and '70s and he showed me this and oh wow! 2022 has come and gone and thank God we ain't eating Soylent Green. oh you never heard of Soylent Green? what's it made of why don't you sit down and I'll tell you a tale...