What makes you think they are post operative at all? Is there a second pic of their respective junk I didn't see?
Here's a funny story, an old one too!
I used to be the technical director and audio engineer for one of the most popular heavy metal bands on earth back in the 80's. One night after a show in Philidelphia we were brought to a local 'Philly bar' (just about the entire crew, band and all) for some 'hobnobbing' as the singer used to say. One of the crew starts chatting up this woman at the bar (hormone saturated men that we were) and about ten minutes later the bar tender calls me over and shows me a pocket sized snapshot of a young Marine, then nods his head in the direction of the woman. I thought he was indicating that the woman had a boyfriend who is a Marine, but no, he was telling me that she WAS the Marine!
As this information spreads among our ranks (it's now obvious that the locals know and relish what's going on), I look over and they're both gone from the bar. Ten minutes later our guy comes running in from the door to the back alley with a look like he's seen a ghost. Turns out he saw a penis, not a ghost! It seems the locals watched this happen quite a bit (the local rep had brought us here, hoping it would happen) and were quite willing to let her keep doing it for their entertainment. Not nice.
It does however illustrate that you can't in ANY WAY tell that a transwoman is pre OR post opperative unless you strip them naked in a bright light and make them show you directly. Turns out this one was a STRIPPER! Now, let that sink in for a while. This transwoman was fooling hundreds of men every night WITH A G STRING ON.
And yet you think YOU can tell with a casual inspection? Or do you think we all need to carry DNA cards that need to be presented at the bathroom door?