He has a point.
Tomoko indeed likes men and consciously she only talks about men when it comes to romance and sex (recently, during the third year graduation; she got super excited at putting that flower on that handsome boy).
But on the other hand some of her attitudes are eyebrow raising at least. Like trying to grab Yuu's butt, that time when she rushed to watch some girl with huge breasts or how he acts in front of Asuka.
That said, let's wait and see.