I like to wonder if sea lions are comfortable in their rocky resting spots

Around this time of year the sea lions of Monterey take over a beach, or a rocky shore right along the Monterey Bay Recreational Trail so you can get very close to them. These sea lions were out on some rocks near a hotel just lounging around. It always makes me really wonder how can they be comfortable on rocks, and are they really comfortable? They must be though, as there are other places besides rocks! Nevertheless, I cannot help but wonder, are these sea lions really comfortable?? What do you think?