A fuck from behind wish all sluts because so they can show in the porn that they are on hardcore fuck. When fucking doggystyle they like to have their big cocks rammed extremely hard into their fuck holes. It doesn't matter if they mix up the fuck holes, because real porn sluts want to be fucked in all holes. If they are fucked in doggystyle, they can also put the horny ass in the right light and provide for particularly hot sex scenes in porn. For these reasons doggy fuck is one of the most popular positions and sex movies should not miss it in any case.