Do we have sex with either gender, you mean? Yes, we do. But when people ask us if we're bi, sort of forces us to say no. We don't consider ourselves "bi-sexual." (We don't like the label stuff).
I know it would be easier to just say, yeah, we're bisexual. But bi, straight, gay, poly, pan, flexi ... if we had a
dozen more labels, it would still be too confining -- and misleading -- in our way of thinking. We consider ourselves sexual. Period. And how that expresses itself depends entirely on whether the other person turns us on.
For us? Sex is never a "defining" thing, not something that we "are" or "aren't." It's always just a happy option, something that we do. Whether what we do comes out hetero- or homo- depends entirely on the person/s or animal/s that we're with.
She answers the same way.