I'll bet a thousand bucks the reason they did that was because a lot of guys' parents came up to school on Sunday, and old Thurmer probably figured everybody's mother would ask their darling boy what he had for dinner last night, and he'd say, "Steak."
Mila dolar jokatuko nuke igandean guraso asko eskolara etortzen zirelako egiten zutela horrela. Thurmerek pentsatua bide zuen denen amek galdetuko zietela beren mutilei zer afaldu zuten aurreko gauean, eta hauek "xerra" esango zutela.