Mindlessly repeating yourself doesnt make your statement truer.
There is a throw-away sentence about being able to mate with females of another species. There is, howere, two arguments to be made.
First, mating with another female doesn´t mean you have a penis. Pitou never showed the slightest hint of a penis, and I dont see how she could hide it in her tight pants. I imagine it´d be more of a scissoring-action, combined with exchanging some fluids.
Secondly, as shinta said, you´re speaking of old information about the ants. Even Colt himself didn´t realize at first why he had those flashbacks to the kids that were eaten to create him. Mixing with human beings shook their whole sense of being, as we further witnessed with Youpi or the wolf-guy. And then we have Zazan, who´s so obviously female. As is Pitou.
If you identify as a woman, you are a woman. Who are you to tell transgendered people who they really are?Who cares if he "looks like a woman"? Lots of men do. And they're still men. Who cares if he identifies as a man? Not you, apparently. Who cares if he "feels" like a woman? Uhhh...
Besides, again, if EVERY outer property of a person is female, at which point will you accept this person to be female? Everything about Pitou screams "I´m a cute cat girl!". Who cares, if her DNA actually features a Y-chromosome?
Hypothetical dream-/hentai-scenario:
I talk to Pitou, she´s got cute, girlish voice. I kiss her soft lips. I strip her naked and touch her perfect sized boobs. I grab her fine ass. I fuck her. I get her pregnant. The end.
Question: At which point was she not a female being? Looking forward to a reply.