Where I went to college we had communal showers at our campus gym and they were notoriously bad. As a result, no one showered there. In our dorm suite, though, only 4 of us had to share a shower. Interestingly, because the whole dorm was set up that way, most of the guys on the floor went around in towels, boxers, or other skimpy attire. We knew who was hung, who was active, etc. Also, we knew the 2 guys who could suck themselves off. They got caught and word spread across our floor as fast as anything.