While I haven't reached the "carry around the house" or "gun in every room" (mostly due to $$$
) stages, I do try to keep at least one handgun nearby my home's entrances just in case...
And I don't believe in guns in the bathroom. Too much steam and other junk to mess with the mechanism. I prefer knives for that. And you'd be suprised how handy a knife in the bathroom can be (opening meds, trimming candles, etc.)
Besides, a little rust & corrosion on a knife doesn't cause jams or malfunctions...it only enhances its lethality...
