The topic below about masturbation and roommates reminded me of morning wood, which was definitely a problem growing up and into my 30s. Rare now, but was every morning as a teen and young adult. Most of the time I didn't immediately get out of bed so it was gone by the time I had to get out of bed in front of my brothers or roommates or whoever during the years. But there were times when it was unavoidable that I had to get out of bed quickly and still had a full one or partial one clearly visible in my briefs. On hot nights with no AC, it was not unusual for us to sleep in our briefs only on top of the covers and so those were the times when it was polite not to comment on what we woke up with in the morning. Still, brothers don't cut any slack with each other so I definitely remember my older brother commenting on the morning boner in my briefs more than once. Scout camp was another example of sleeping on top of sleeping bags and either waking up with a full scale boner or even worse, a wet dream that was impossible to hide. Same with college roommates. If we rolled out of our beds at the same time, I would be self-conscious about being hard as a rock and sitting on the edge of my bed and my roommate in a similar situation sitting across from me and neither of us saying anything about the other. Fortunately, those boners don't last long. Waking up after a wet dream was definitely trickier to hide.