Ah, the joys of having a loose cockles.
It's sometimes a bit awkward when I'm working and I get this feeling something's not completely right down there. The packer's not escaping or anything, I wear enough tight underwear to prevent that but when it starts doing somersaults and ends up basically upside-down and I really need to fix it, it can be a pain to find a little more secluded place in the construction site so I can start digging my pants. XD
Those situations were even more awkward when I was still at school and my friends didn't know I was using a packer (they knew about my transitioning otherwise). :'D