My 'free with Weetabix vouchers, definitely do not plant on a north facing wall' passion flower is flourishing for the 20th year, despite being on a northish facing wall and my complete lack of gardening skills.
Contacted a friend who rescues angry feral cats, she recommended this hand gesture, which they call the Llama of Friendship
It may mimic non-threatening inquisitive cat ears, but regardless of the mechanism I have learned I will not be attacked as long as one hand is llama-shaped