Well, if it hurts, and you've tried several different angles, then this may just be too painful a position for her. Have you tried spooning instead? This is still a "behind" type of position, but gentler on the woman.

Also, porn means nothing. DOn't take your sexual advice from porn. If you think that's how sex should be, turn it off.

I agree with Eiri that you should never say, "Well, it happens in pornos," and expect your own sex life to be like that.

Some positions hurt different women. A lot of the time it is because certain positions will allow the penis to hit the cervix, which can hurt the woman. There is not much you can do other than be understanding and avoid the positions that hurt her.

I would suggest fingering first. The anus is very sensitive and if you gradually stretch rather than going straight to sex, the results might turn out differently.

You are right that fingers should often be used before anal sex, but anal sex is not the same as what is commonly referred to as "doggy style." Doggy style is a form of vaginal sex.

have you tried simply not penetrating her deeply? it is likely you are hitting her cervix and causing her pain. and yeah, porn is all fake lol. these people are paid to look like they are having a good time.

i have the same problem as your wife. My boyfriend loves doing it doggy but it really does feel uncomfortable... im not too sure why... but we do enjoy haviing sex in many other positions. you dont always have to go back to missionary. try mixing it up and explore a little bit more and mabey you will find a position you'll like more...

and dont ever refer to porn. its all fake.. i never really believe the girl is enjoying it. It probably hurts her too but she has to suck it up because she's getting paid... dont ever believe that and dont expect your wife to do what they do...

Good Luck!!