I found that consistent exposure will desensitize you to it. When I started researching what procedures I wanted, I looked at pictures from all stages - pre-op, on the operating table, immediately post-op, months post-op, etc. I listened to talks from surgeons, or the experiences of other guys.
Now I can look at gory surgery photos all day and with no medical background, can give you a simplified version of what exactly is going on in each shot. Which I think is important, especially for bottom surgery. It's a complicated set of procedures and most guys will need to link up with a urologist to handle any issues that arise. Much easier to do if you can explain exactly what went on down there.
What bothers me more is thinking about it in the context of myself. Like if I'm looking at those photos and thinking "Hey, my bits are going to look like that in 35 days". I get this weird droppy feeling in my stomach for a few seconds. I'm kind of glad that I won't be awake and won't have to see anything but the before and after.
My hysto was the first surgery I had where I was totally naked (top surgery I kept my shorts on). It was very disconcerting, being someone who never lets anyone see them naked. Especially as I'm sitting on the operating table before getting put under and just seeing a steady stream of doctors and nurses coming in. Like, how many people do they really need to take a uterus out? They use a robot for pete's sake, shouldn't that reduce the number of people that need to see this show? I'm sure at least 20 people saw my goodies that day.
It gets easier though? After that I went to 3 different bottom surgery consultations, dropped my drawers for all of them, and never once felt like it was a big deal.