Azithromycin pre med dental dosage

Have you considered a series that has Zach attending pre-med and then medical school ? Dana and Zach could even attend the same undergraduate school with Zach majoring in Pre-Med and Dana in Physics .

her vulva? Seriously? Is he a pre-med student? Or just that lame?

that doesn't mean he knows one fucking thing about medicine. In fact, a pre-med student will spend their entire four years of undergraduate studies studying everything BUT medicine. The closest thing to anything remotely medical would be anatomy, but that's like studying geography as an undergrad, as preparation for graduate work in geology!
Pre-med course work is heavy in chemistry, human biology/physiology, psychology, etc.
Attributing any sort of medical knowledge to a first year pre-med student gives your otherwise decent story a high stupidity factor. It's about as dumb as having a black character who doesn't eat pussy. Oh, no, excuse me, THAT isn't dumb, THAT is a racist stereotype.
Mark having medical knowledge because he's pre-med, would be like making all the cars be flying cars. It adds nothing to the story, is a distraction because your readers are asking themselves, 'flying cars? why?'.
You could add some character depth to the story by relating something a pre-med might learn in anatomy, like some statistic about boob size, or something about cum volume, or the female orgasm, which might be learned in physiology.
Fifteen minutes of research would have fixed the 'pre-meds don't study medicine, they prepare to study medicine' problem and another 15-20 minutes Googlin' would provide something interesting which could be actually learned as a pre-med, and would improve the depth of your story, as well.
Not a bad return for 30 minutes of time.
GeoD