I have just come back from giving a final, and I'm reminded of the cycle of affect that I feel for my students each semester.
The first couple weeks of the semester they all sort of look alike, and I have no feelings toward them one way or another.
Then I get to know them (they are rather likable, and we do spend a fair amount of time talking and joking).
Well, by mid-semester, I really like like them such that when finals come, I'm rather sad to see them go. This makes for a funny emotional disconnection during the final. As they leave, I'm thinking that this is probably the last time I'll see them & I'm saying good-bye to a friend. They, on the other hand, are in a finals funk and sort of trudge off to their next final.
P.S., the student who was making out with his girlfriend in class asked if he got extra-credit for bringing a date. LOL