Naps for me go in cycles. I'll go a few weeks with nary a one, and then one week I will sack out for a while in the afternoon almost every day.
For the dogs it is a treat they relish.
My bedroom opens onto the living room, where they are often sprawled on the couch by the front windows. They don't have free-run of the bedroom or they'd be on the bed all day when they're inside, which I don't want. But if I head toward the bedroom door they are off the couch, or wherever else they are, in a flash and right behind me— in anticipation of a possible "nap time" coming up.
I'm not sure why it's such a special event for them, but it is. Nap-time consists of me lying in the middle of the king-sized bed and Emma on the window side, tight against me, and Mags on the other side, also tight against me. I keep a blanket on top of the bed and usually toss it over the three of us. Emma is quite a "talker" and at that point she usually starts in on her muted Song of Bliss. Mags just snuggles and goes to sleep.
Naps are a great blessing for those who make their own schedule and have the time for them. The dogs agree whole-heartedly.