No, Nope is a boy and asexual, because I'm a girl and bisexual. Obviously!

And I think Pffh is right; because our world is so gendered, generally speaking boys have more common experiences with one another than with girls generally. In sweeping terms. This doesn't necessarily hold true for any particular boy or girl and is even more complicated with trans people.

But people are all capable of huge amounts of complexity. In fact, you could superficially understand someone and they could totally blindside you at any moment!