Grab that standard issue chair and lean over it, holding on to the back. Have him come in from the rear—either entry point is fine, you're in college, experiment.
If you decide to go for the rear-rear door (go slow and use a shit-load of lube, so to speak), that good ol' sturdy chair will give you something to grab onto when/if you need it.
There's zero privacy, you can't make too much noise (or, you can, but you'd be an asshole), and your main place to do it is a super uncomfortable bed. (Put a towel down first because it is cold, plus butt on fridge = yuck.) Back yourself onto his lap, giving him an eyeful of your glorious butt as you lower yourself onto him.
Between 15 and 25 percent of women experience date rape during their enrollment, and victims of abuse come from every race and gender.
This generation is radically rethinking straight sex and marriage, but at what cost?
If you don't want anyone bearing witness to your unholy yoga, don't forget to alert your roommate with your prearranged secret "don't come in, we're fucking" signal: a sock on the doorknob, a cryptic symbol on your door's white board, etc...
Bunk beds: shitty to sleep in, but full of creative sex solutions.