Starting Anal and butt plugs

Hey people,

Need some help and advice, I've resently been having a love-hate relationship with anal sex as it something I'm still trying to get used too.

I've noticed that when my partner is getting me ready for anal by fingering me is feels like I'm kind of pooping, I've heard anal stories of poo being everywhere and I'm really worried that one day that theres going to be poo either on my partner, the bed or myself does anyone have any tips or tricks I could use to calm my worries and make it not feel like I'm going to poo everytime?

We've recently bought a butt plug tail for me to wear and some ears I'm very worries about the plug getting lost or when coming out it being covered in poo, is there anything I could do before anal sex or plugs so theres a lower chance of poo being everywhere?