Okay, in the novelization it appears that when McCoy is getting Kirk on the Enterprise he says Kirk is suffering from blue balls and a huge ego. That's before it gets slashy.
The bording officer asks "Good Lord--what happened to him?":
Struggling to keep his friend vertical, McCoy spoke without hesitation. "He's suffering from an inflamed
epididymis complicated by excessive swelling of the ego region of the cerebral cortex. Got exposed to gram-negative bacterium in the lab. Was writing out the order to send him to the hospital when the alert sounded."
The officer took a long step backward. "Is is...contagious?"
McCoy shook his head. "Wholly internalized, transmittal vector is only via direct fluid exchange, no danger to anyone else. He should come through fine if the fever he's suffering from now doesn't boil his brain."
Kirk's eyes widened as they snapped to the face of the man holding him up. There were several questions he badly wanted to ask. Unfortunately his tongue seemed to have transported out of his body, leaving an empty place in his mouth that matched the expanding one in his head.
Emphasis and link(obviously) mine.
And...that's kind of hot.
He then goes on to say: "It's not like I'm trying to sneak my girlfriend aboard." (O rly?)
Wtf, book. Wtf.
"Inflammation of my what?"
"Shut up," McCoy hissed as they neared the top of the ramp, "and keep walking. Try to help me, Jim. Make your legs work."
This may actually cause me to read the whole book instead of flipping through for script bits. >>'