gettin my a$$ 8

okay okay so i’m pretty soon going to be fucking this guy and he’s already told me how he wants to eat my booty. now i haven’t ever really been into the butt play, not even a thumb in the butt but i wanna give this a try. can someone just give me some basic run downs please? how to freshen up down there, what to expect? does it tickle? am i supposed to hold his head there like I do when he eats my kitten? what if i fart? I’m very nervous LMAO. I’ve been wanting to fuck this dude for a while and I want it to go smooth so if anyone could lend a hand of some sort, I’d appreciate it much.