Yes, but if you are followed by a person who has lost his arm because of you, then it is a good idea to bathe with your gun.
Don't be fucking stupid, nobody bathes with their gun. This is the 21st century... you
shower with your firearm.
Re: Shoulder holster... what type of pistol are you trying to conceal?
Fobus, Uncle Mike's, Bianchi (I think that's the name, something similar either way), Galco, Blackhawk, Bladetech... all places that probably have some type of shoulder holster, off the top of my head.
Granted, I don't really know for sure, since I'm fat and there aren't any that fit me at all.