[...] fully erect [...]

I missed this part of the extended Terminator trilogy

The two in front look like dinner

On the left - species unchanged over billions of years.

On the right - extinct. Soon to be extinct.

You know who else has fully erect stances?

"Holy reptile! These pale monkeys looks creepy as fk with all that flaccid pink skin in full view."

"Yeah for sure. At least the other warm-blood Ones have some fur to cover their scale-less disgusting shame."

"And what the hell are those flaccid things between their legs'"

"I think those are their genitals"

"You mean... they can't retract them inside?"

"No. I don't think so."

"Disgusting."

And the theropod is standing on its toes