Why not carry another one? You have fore arms...
Mainly because one would just be sitting in a safe all day if I didn't bring it out. Also you can give one to somebody in a shooting and still have a back up. Plus they're not that uncomfortable. I actually used to think some guns caused genuine pain to carry based on videos I'd seen where people talk about ounces. =\
But most importantly I've got three guns man.... It's probably a phase or something idk.