tl;dr I went down on a classmate for a period of a few weeks until our time in the field was over.
I was a college student graduating almost 15 years ago and about 10 years older than my fellow students due to being in the service and doing a few different things before starting college full time. I was in a science major with a capstone class requiring several weeks away from home working in the field. The mix of M/F in this major is pretty close to 1:1.
There was a female student and while she was an undergraduate she was in a position as a teaching assistant to the professor in the program. As a teaching assistant she had her own room and wasn’t sharing one like the rest of us. She had already taken this course the previous year and there were rumors about her behavior during that time and that gave me a good idea that she might be down for what I was planning.