Is it ham acting or a double bluff? I mean, is he aware that he is fooling nobody but thinks that makes him even more endearing because he is a wee bit cheeky to be so brazenly hammy?

He does swear for a start, granny watching or not and he didn't hesitate to nominate once the threat of eviction was upon him if he didn't.... he didn't have to think twice, despite having said that he hadn't given it any thought at all.