Oh, phrenology's been back for a while. Or at the very least, these idiots have been taking tape measures to bones because of bigoted nonsense. Phrenology in the historical sense might actually be too complex for them.
Incel communities have long been touting the existence of a dating appeal hierarchy based on "canthal tilt" and "hunter eyes." They believe that you're born more or less likely to pick up "Stacies" based on the subtle shape of your eyebrows and chin. Meanwhile, "transvestigators" take the "we can always tell" insistence of transphobes to such insane depths that they think they can tell from photographs and video that every person they see on TV is transgender and secretly part of a literal satanic cult because of minute observations that they think they're making about celebrity bone structure. Oh, yeah, and it's a huge staple of transphobia just in general. "Transvestigators" have just raised it to what they think is an art form, but is really just raw, concentrated delusion.
Never underestimate the depths of pseudoscience to which people will stoop in order to create out-groups. You will always be disappointed.
I'm in camp "Midwestern American who says tuna fish". . .but I'm also right there with the person that said they don't order them and tuna fish sandwiches are something made at home.
For the record, I don't know why the fish part is specified. It just always was. It's not like my family called it a "can of tuna fish" growing up or anything. It's just the sandwiches. Put that tuna between two slices of bread and suddenly the word "fish" gets thrown in there. Maybe it just sounds more fun if you add more syllables? Either that or somebody in the region had to explain that tuna was a kind of fish years and years ago and it just stuck.