Dogs love to sun bathe! Lyla would do it more often but our bigger windows face north and south So we don't get a whole lot of direct sunlight. But there's a few times of the year when we get some, and Lyla takes advantage of it! It shines right on our bed, so she just basks until she starts panting and moves out of the sunlight, haha.
The sliding glass doors are facing the east so nice and warm, in the winter I keep the curtains closed but that doesn't prevent Pia or the cat Walter Grey from sunning themselves between the glass and the curtains.