Sometimes I like to sit on the couch with my back against the armrest, my legs out in front of me, and laptop on my legs. This is usually fine at first but my lower back gets uncomfortable pretty fast. I try using a pillow for support, but it only helps a little.
That's intentional. Jean-Honoré Fragonard had a goofy style.
Self portrait
Marie Emilie Coignet de Courson with a Dog