Funny you say that. It took me years to make my mum understand the concept of working from home. Whereas people my age seem to grasp instantly that if I'm home, I'm at my busiest.
I'd wager that in our various parents' generations (no idea how old you are) one of the biggest factors that determined whether you could chat with someone on the phone was whether someone was there to see you do it. If you're at work, your boss can catch you 'using company time to handle personal tasks'; at home, nobody is there to watch you like a hawk.
