Your friend sounds like he enjoys being both creative with, and full of steer dung.
At 16 it'd be hard enough to get HRT from a reputable source, let alone surgery. I really doubt any surgeon would do bottom surgery on someone so young.
And I also doubt any 16 year old would be able to afford top surgery - let alone bottom surgery.
I smell moo poo.
I think you're dealing with a kid armed with photos of someone else, a healthy imagination, and absolutely no self confidence (or, he's looking to mess with you).
Seriously, don't worry about it. The kid's just being a dick. Identity comes from within.
The current state of bottom surgeries is totally unacceptable to many men (myself included, and I am very much "a guy"). It does not make you less of a man - it just makes you a picky man with high standards