Planetary Alignment?

A few days ago, I walked into my kitchen on a hot morning and found my pugs all arranged on the floor like this:

They were all pointing in the same East-West configuration:

And, upon further inspection, I saw that the middle pug had appropriated a dish towel and turned it into a bed:

Why were they all aligned like satellite dishes receiving a signal from outer space? Why does my eldest pug think a tea towel is a comfy bed?

Why ask why? They're pugs.