I so got over being shy about my cock - or its boner condition - when I was in the military. Being housed with so many men in the same barracks, using gang showers, and trough urinals was a blessing. And not just because of the eye candy on display. Attempting to hide ones genitals at all times not only becomes uncomfortable, it can be detrimental to your dick.
And to your nuts if you ever plan on becoming a father.
Let it out to breathe; show it some love.