Other students actually had to explain it to her repeatedly before she got it. Now, everytime we bring up "oxymoron" in class as an actual literary term, that same student haughtily exclaims, "Remember when you called us morons?" I suppose students these days like to remind others of their ignorance?! (Actually, that's probably true. They don't care if they get called on and don't know the answer. In fact, sadly, they are often proud of not knowing something. Sigh.)
I think we exhausted a good ten minutes that day at those poor girls' expense explaining concepts they should've grasped in their mandatory health class the year before. I remember distinctly pointing to my abdomen saying, "Your stomach is up here, while your uterus is lower down, here. Although on me, it's encroaching upon my rib cage at the moment!"