I'm assuming that Food porn is that Food that looks tasty. I didn't really do a bang up job presenting this but neither did I really care nor think about it all that much I just wanted to dig in and eat some good grub
This is like randomly finding one of those pictures of genital diseases with blisters and everything and calling it porn because it depicts sexual organs
I came to the comments to find out WTF a three cornered onion was but left having very much enjoyed OP getting shat on for his plate of je ne sais quoi