Not just a slut but the "shame of the female gender" as Reina would say.
Humor is and will always be the main component of the game so I tried to exaggerate the male / female stereotypes to create a comic effect.
In the ending [Female / Same age / Love] Takuya gets married and have children, it's what all women dream of, right?
Similarly Takuya as a male run after boobs and fight; the game to try be comical is made of exaggerations, stereotypes and symmetries.
I thought the irony was obvious.
Edit:
I've been asked about this "slut" thing several times and I honestly don't see the point.
How else could I do a fast H-tag sequences game?