It’s no definite proof, it is just very unlikely that they can remember their former partner but can’t differentiate between sexes. They look all the same to us but not to them.
Someone else debunked my comment but they still more likely go to their old partner so they seem to remember them
I dont see how the former links to the latter.
I’d imagine being able to differentiate sex (I doubt they have a concept of gender as we understand it) is an evolutionary necessity, though.
It’s no definite proof, it is just very unlikely that they can remember their former partner but can’t differentiate between sexes. They look all the same to us but not to them.
Someone else debunked my comment but they still more likely go to their old partner so they seem to remember them