Bring it forward for what, exactly? Why do you think you need answers? When it’s in our hearts to treat people equally, there is zero motivation to “understand” what is inside their underpants or question their identity. You can pretty up your line of “innocent questions” all you want but it doesn’t change the reason you feel compelled to ask in the first place. Someone’s assigned gender at birth is simply not your business. Unless your goal is to treat transgender people differently, you’d no more ask these question than you’d ask to look at your own mom’s vag to satisfy your “curiosity” about “who she really is.”