Lab Partners? Nah, Freshmen clean them during their classes and you just arrive to clean sets, need further cleaning? Just take another one of them out of classes, not that they can learn anything of them, that's for older people.
Whilst the wording is mine it's a derivative from a more famous quote.
There was a guy who used to draw hentai at school, he did so at recess in the dark room; when a teacher found a strange folder with over 500 pages of tentacles the results were not pretty.