A new intern is getting a tour of the hospital he will be working in. He walks past a room where a man is vigorously masturbating non-stop, and asks the doctor why the man was doing such a thing out in the open?
The doctor replies, "Oh he has a medical condition where the sperm builds up quickly in his body, he has to masturbate constantly or he will explode."
"Oh, I see," says the intern.
They walk past another room where the intern sees a man laying on a stretcher getting a blowjob from a nurse.
Again, he asks the doctor "What's up with that?"
The doctor says, "Same condition, better medical plan."