The problem is merely the choice of verb and its modifiers, but the image for the reader is something else again. My own phone is smallish and flat, but still I think sitting on it would be sufficiently uncomfortable that I would not want to do it for hours, and if I tried to sit on it for hours I am sure I would have some words to say, most of them unpublishable.
Of course I knew what my student meant: he meant “kids today can sit staring at their phones for hours…”
Generally I expect that when people sit silent for hours they are thinking (do we still say “lost in thought”?). When I’m really thinking, I stare into space, or doodle meaningless and badly drawn shapes, faces, embellished words…. Yes, I am silent. I come back from these mental excursions with a decision, or a plan, or a tentative idea, or an explosive expression of frustration.
When I sit for hours staring at a screen (my computer screen—I’m too penny-wise to do much on my phone other than talk), I may start with a thought or question but generally then embark on a mildly interesting wander-by-click through loosely related sites, stopping from time to time to join in some emotion-laden exchange of “comments” or take some silly algorithm-driven “quiz” or loop back to feed my dog on “Criminal Case,” ending suddenly with the realization that hours have passed and I have no idea how or why. That, I presume, is the kind of “sitting” my student had in mind when he wrote this sentence.
And he was lamenting that kind of sitting, as do I.
Now, some long-term silent-sitting-on-things can be productive. I’m thinking of the mourning dove currently nesting in the rose vines along my porch roof (I can see her from my window right now). She and her spouse take turns, exchanging their dove whoo-OO hoo hoo hoo only during that process. This is the second year I’ve had mourning doves nesting in this spot, which is hugely popular. Over the last seven years I’ve had two robin couples, one of whom raised four wonderful kids and the other of whom lost their eggs to a night raider; one cardinal couple, nesting on their tiny straw saucer and raising three lovely babies; two couples of house finches, one of whom last year crafted an amazing apartment for a clutch of kids, the other of whom (could it have been the same ones?) moved into it at the beginning of this season to raise a clutch; and three years ago the other mourning dove pair. Doves lay two or even three clutches a season, usually in different nests; but this season the happy couple settled back into their original nest two days after the second little squab took wing. With each of these families, I have been moved by their trust, their patience, their tolerance of us and friends (and mail carriers and delivery guys) in our comings and goings, their care of eggs and babies, and the emptiness we feel at their departure.
Anyway, I have to thank my student for launching me on a train of thought that brought me to my own study window and the sweet bird outside. How can she be comfortable sitting on two eggs? How can she be comfortable once the eggs hatch into wiggly, beaky, demanding little critters tucked up under her body? I suppose she tolerates it because it’s only once or twice a year and because she is participating in the perpetuation of her species. I’m sure she knows that…
Students surfing other people’s selfies, sending texts (and tweets!), playing games, reading random stuff, are probably not perpetuating the species or giving anyone else much joy. So I wish my student had said what he meant. What he wrote launched me on a brief but hilarious contemplation of kids sitting like nesting birds on their phones, certainly not comfortable, possibly expecting something to hatch. What a contrast to actual birds, and to the students he actually was trying to describe!