I'd be reluctant to marry a guy who insisted I get a sonogram to prove I have ovaries, or wanted me to see the OB/GYN to see if my hymen were intact, or anything else which indicated he might value me less if I didn't match his preconceived notion of what is acceptable.* I think the man would feel justified to see it the same way with her insistence that he prove he is "functional" before marrying her.

* I would understand the guy wanting a genetic test, if his family had a history of some genetic disease, to ensure we weren't both carriers. That way he could know in advance whether he wanted to risk having children with me or not.