She has no interest in her appearance, or in intimate contact with either gender on other than a friend level. She's the closest thing to a mentally "neuter" person I've ever met (which is what makes the BF's ideas just even more ridiculous).
My stepdaughter has Asperger's syndrome (it's a disorder on the autism spectrum). I don't know if that has anything to do with it but she just doesn't relate to or is interested in sex or sexuality on any level. It's like she's permanently 11