I dont know. Its all I want to do. My wife is receptive to anal sex and likes it so thats good for me. But, I'd be in her ass all day and all night if I could. Its just naughty and dirty and you're not supposed to put your dick in there. But, it feels great and I love looking down at my wifes asscheeks seeing my weener buried in her poop hole. Its freegin hot.