MSD

One of my biggest fears is smelling bad. I won't leave the house without showering unless I showered immediately before going to bed, and even then I don't like to do it (although this is more about sweat and oil than smell, I have been assured that in day-to-day life I smell find at the end of the day, and even if I just wash up in the morning instead of showering.) It's just plain rude to smell bad around other people. The bigger problem is that people habituate their own smells and either don't think they need a shower, or decide to reapply their scent throughout the day. Our non-confrontational attitude makes us think we're being courteous if we don't inform people that their smell is offensive. Be tactful, but tell someone who you're around for a while if they smell, that may be how they find out about it.
As the Ayatollah, I command you to do so.
No. Old books smell good. BO does not.