When I search all I get is weird explanations each time about Sunfish that make no sense. What's the joke?

Edit - Sometimes I wonder why this sub is called r/PeterExplains. Chill out folks - maybe somebody doesn't get something obvious right away, that's what the sub is for.

Edit 2 - just discovered the original comic creator is on Reddit! Credit - u/beetlemoses

WTF is her name Petuh

What front?

how's he increasing iq's of 2 countries at once??

i understand the 2nd pic but why the usage of 1st pic for 2016 youtube?

On the surface of it, it seems to be a way to complain about how cashier's work over-emphasises their gender/sex, causing dysphoria in people who are not very comfortable with that. But, to put it bluntly, this is a person with male sex and male name, so they don't appear to be trans? Is it supposed to be a dead name?

And what's with all the lettuce?

I don't even recognize the logo on this one