the way they gestured to each other

It first came to me watching this couple, Susie and Greg--probably the oldest students at the Cottages and generally thought to be "in charge" of the place. There was this particular thing Susie did whenever Greg set off on one of his speeches about Proust or whoever: she'd smile at the rest of us, roll her eyes, and mouth very emphatically, but only just audibly: "Gawd help us." Television at Hailsham had been pretty restricted, and at the Cottages too--though there was nothing to stop us watching all day--no one was very keen on it. But there was an old set in the farmhouse and another in the Black Barn, and I'd watch every now and then. That's how I realised that this "Gawd help us" stuff came from an American series, one of those with an audience laughing along at everything anyone said or did. There was a character--a large woman who lived next door to the main characters--who did exactly what Susie did, so when her husband went off on a big spiel, the audience would be waiting for her to roll her eyes and say "Gawd help us" so they could burst out with this huge laugh. Once I'd spotted this, I began to notice all kinds of other things the veteran couples had taken from TV programmes: the way they gestured to each other, sat together on sofas, even the way they argued and stormed out of rooms. Anyway, my point is, it wasn't long before Ruth realised the way she'd been carrying on with Tommy was all wrong for the Cottages, and she set about changing how they did things in front of people. And there was in particular this one gesture Ruth picked up from the veterans. Back at Hailsham, if a couple were parting, even for a few minutes, it had been an excuse for big embraces and snogging. At the Cottages, though, when a couple were saying goodbye to each other, there'd be hardly any words, never mind embraces or kisses. Instead, you slapped your partner's arm near the elbow, lightly with the back of your knuckles, the way you might do to attract someone's attention. Usually the girl did it to the boy, just as they were moving apart. This custom had faded out by the winter, but when we arrived, it was what was going on and Ruth was soon doing it to Tommy. Mind you, at first, Tommy didn't have a clue what was going on, and would turn abruptly to Ruth and go: "What?," so that she'd have to glare furiously at him, like they were in a play and he'd forgotten his lines. I suppose she eventually had a word with him, because after a week or so they were managing to do it right, more or less exactly like the veteran couples.