You can put whatever you want on the walls as long as it’s appropriate.
So, no pictures of penises?
Not unless it’s very scientific.
“There are a couple of things I want to impart to ladies who want to be in comedy: One, you don’t have to be weird or be quirky to get your job done. And two, comedy skill is not sexually transmittable. You do not have to sleep with a comedian to learn what you’re doing. Male comedians will not like that advice, but it is the truth.” - Tina Fey
Kristen Wiig interviewed on Late Night with Seth Meyers (April 8th, 2014)
To see the world, things dangerous to come to, to see behind walls, draw closer, to find each other, and to feel. That is the purpose of life.