An 'A' student
I used to be a college professor teaching English Lit to freshmen, so most of my students were between 18 and 20. One quarter my big class had over 80 students, so keeping track of students' papers, let alone reading them, was a challenge.
The week before finals they had one last writing assignment which was going to be worth 40% of their final grade. Everyone in the class turned it in on time except for one named Claudia. I tried to remember a Claudia but I couldn't, so I wasn't sure she had never come to class and she certainly hadn't written a paper for me. The evening of the deadline I got an email in my school account from a Claudia, who said she hadn't turned in her paper and wanted to come see me tomorrow at the end of my office hours.
I began to have fantasies that night, and did the same all morning. When I went to school that afternoon for my office hours they dragged by until, just as they were supposed to end there was a knock on my door. "Come in!" I said loudly.
The door opened and an incredibly hot African American girl came in and closed the door behind her. "Should I lock this?" she asked innocently.
"Okay, if you want to," I said.
She locked it and came across the room to sit across from me with a big smile. She sat with her legs crossed very high so I could clearly see she had no panties on, then she spread her legs to show me her pussy. "So what do you think, Professor," she asked, "do you think we can work something out on my grade?"
I was kind of tongue-tied so she knelt in front of me, unzipped my pants, and took out my cock, which was already stiff. She licked it and began stroking it. "I think a good blow job should be worth a 'C,' don't you?"
"Yes," I mumbled, and she began to suck my cock. This went on for a few minutes, then she sat back on her heels and looked at me quizzically.
"But if that's worth a 'C,' what would fucking my pussy be worth?"
"Maybe a 'B'?" I said, clearing my throat.
"Oh, good," she said, "and then what would fucking my mouth, my pussy and my ass be worth?"
By now I was regaining consciousness, and I asked, "How many times?"
"What?" She seemed surprised.
"How about every day until a week from tomorrow when my grades have to be logged in?"
She smiled and said, "You are a sleazy bastard, aren't you?" But then she pulled her skirt up around her waist, opened her blouse to expose her bra-less breasts, and lay down on her back on the small leather couch. "Come on, baby," she said, "put it in me."
We fucked for about 20 minutes in the mostly-empty building, then we made a plan for the week and she left.
Definitely an 'A' student.