My guess is, in their relationship, neither one pretends to be the male.
This is making the rounds on twitter.
An episode of Bill Nye where he has someone explain there can only be a male or female....
At the 8:38 mark.
https://www.youtube.com/watch?v=uLd3O0O0k-8
must you post pictures of Ki-Ki Keillor...? my God, man, have you no sympathy for your fellow browsers...?