Also, you should take people's gender identity at face value without needing to see their genitals apparently.
This argument drives me nuts, and the fetishism underlying it is a lot more obvious than the people making it might hope.
The women questioning your presence in toilets, changing rooms, etc don't want to see your dangly bits, guys. We really, really don't. That is in fact one of the reasons why we'd prefer that you not use those spaces. Trying to frame our discomfort with having men in those spaces as a desire to inspect their genitalia comes across as very very male, and anyone who's ever been involved in the BSDM community will spot the fetishism going on there from miles away. Nope, sorry, not interested in being your provider of sexualized humiliation when I nip into the loos at the shopping center for a quick pee.
In terms of the article in general, I've peak transed so many people by showing them this because the idea of doctors as Dr Evil-like figures snatching infants away from their mother's loving arms to perform the wicked procedure known as "noticing what sex the infant is" is so ludicrous.