Coincidentally, you also have situations where one person becomes addicted to porno. So much so that they begin to be turned on more by what they watch, than by their partners. In other cases, they would much rather masturbate to porn, than to have real sex. Worse case scenarios is when a person wants to have his or her partner do certain sex acts or positions they see being performed on smut videos. Some get their ideas from sex videos found on sites such as 3Movs. Many people upload amateur porn movies there since it is a haven for private homemade porn created by regular everyday folks.
It is no secret that most couples are hesitant to talk with one another about their sexual fantasies. Especially those where their partners are not part of. The same when it comes to masturbation and other things. However, if they both can talk openly about these issues, then it is likely they will gain from porn viewing. For example, they can find tons of videos dealing with fetishes or sexual fantasies. Many adult sites have videos recorded by regular individuals who are not professionals or even into porn.