Why?

Sleep was considered pretty much sacred in my household growing up. Naps were a necessary part of life and my family understood and respected that.
Even now when I go "home" - I can always count on a long uninterrupted nap on my mom's bed.
So why is it that I can't get that same quality nap with my own family?

I tell the fam, "I'm deliriously sick. I have to take a nap."
David responds with his cavalier, "You go ahead hon. I'll take care of everything out here."

Just as I finally drift off (after trying to tune out David's constant ringing of the work phone) I hear:

"Mom, I'm not waking you up - but I have a Mesopotamian project that's due in the morning."

10 minutes later:
"Mom" (in a not so whisperish whisper), "what's for dinner? (note: this was at 1 in the afternoon) I'm not hungry now - just wondering . . . ."

7 minutes later:
Molly whining at the door wanting to come in.
Still whining combined with pawing.
Whining until someone finally opens it and lets her in.

3 minutes later:
"Mom - can you make me some pizza rolls since dinner's not for another 3 hours and 22 minutes?" (giving up on that whisperish whisper completely)

I give up. It's more work to try and get a nap than it's really worth.
I figured David must have gone in to the hospital so I may as well take care of things.
Nope - he was cozy as can be on the couch in front of the t.v. - asleep with the remote in hand.

Why is it that the fam doesn't think to ever bug dad!