Both in college and now that I share a flat with two guys, we never covered it. My college roommate commented on my tent and I just told him that I'd seen him tent as well and thought it wasn't a big deal and we agreed it wasn't. With my flatmates, we never really mentioned it. A few mornings when two of us have had a tight schedule we've shared the bathroom and I've seen one of them hard a couple of times there and he's seen me as well. Again, nothing overly awkward about it, even though I think he mumbled "sorry" the first time (he is straight lol).