Not a second thought about it with college roommates or later on in the military. Overseas deployment to a hot climate with little to no A/c meant a lot of underwear and nakedness just to try to stay cool. Forget trying to worry about it with open showers and bathrooms and guys sleeping in groups. Later no problem when married until daughters came along and then just shorts over the underwear and problem solved. There are bigger things to worry about and when did this big modesty craze come about?