I've only had full anal penetration with my wife a few times but God is it good, the toughest part is not filling her asshole with cum the instant my bell end slips into her super tight hole. She absolutely loves it when I rub my stiff cock against her bum hole while stroking her pussy and sometimes she gets so hot she just pushes back against me until my cock has nowhere to go except up her back passage, she says it hurts, but in a good way, and makes her cum like crazy!