Andrew Garfield is now in his early 40s, but when he lollops around with his rubber limbs flapping every which way and a happy-go-lucky smile plastered across this face — he’s like a goofy Pied Piper trailed by enchanted tech bros — you might swear he’s a teenager. That makes it diabolically clever of Luca Guadagnino, a gay director never shy about exploring queerness, to cast OpenAI CEO Sam Altman as the “demon twink” archetype. Whatever sorcery the makeup or effects department has performed to put the glint of sociopathic madness in Garfield’s eyes, it works. But what makes Artificial,…