clever ways of saying no

my bf keeps asking to try anal bc he's curious and I guess vaginal and bjs aren't enough. And plus he keeps saying that he wants to eat my ass and I'm not all in for that. I just really don't want to be touched in that area 😁 so what are some clever ways of saying no to those to things bc it gets annoying at times and he doesn't fully understand that I don't want that atm.