Yes, Do it in the doggie position, and get good and relaxed.. let your partner use there fingers and tongue to relax you and loosen you up a bit... Then, with the head of his cock pressing against your asshole, you slowly move backward onto his cock. You control ALL the movement.... how fast, how deep, and how many times. You can get used to the fullness at your own pace.. And when it feels right,,, you can fuck your own ass as hard and as deep as you like.. Just make sure you have a partner that lets you control everything from start to finish. You will get to know what you can take and what you enjoy.. play safe and enjoy...