I think he must not be named would simply shrivel up under your combined attack.

You know, she might not be realising it's hard for two boys for the same reasons an adult or older kid would think. She might be thinking about clothes, or who would issue the invitation, something like that - kids have quirky ways of looking at things sometimes. It might be worth asking her why she thinks it would be hard (after all, in your country and mine same sex marriage is legal so someone somewhere has to be able to ask someone for a date...)and see what she says.