What guy in college did not at some point need a good airing out?
When I was in college, four of us shared a suite. One guy had a little different hygiene standards than the rest of us. When he got a little too ripe, we dropped some subtle hints: leaving a map to the shower on his desk, telling him not to move so much because stink molecules were falling off, turning on the shower and picking out a change of clothes from his drawers, etc.