I don't think it feels bad for all women(porn stars included) but I do believe that they do ALOT of acting and if someone is getting paid to really look like shes enjoying....then yeah it probably makes it easier to pretend.

I myself enjoyed it with the one guy I tried it with. It was because HE made it enjoyable. Just don't assume you can just start pounding the girl like in the porn films. They (like blackrose said) are probably VERY used to it and have done it soooo much that its no big deal to them. They do become numb to it. But honestly the 7 times I have done it.....it hurt at first each time a little bit.....but he went slow....and took his time with making sure I was comfortable. That made a BIG difference. We tried spooning a few times and tried it doggy a few times. Both are pretty good..... Definately make sure to rub her all over....and then focus on the clit. This helps ease any discomfort.....and overrides any pain there is in the beginning......and then the little pain there was in the beginning becomes somewhat pleasurable.

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Appreciate the good times and learn from the bad times....