i dont think it's cheating unless you are doing it behind someones back....

I know my girlfriend has porn (its actually mostly gay porn lmao) on her computer...
things might be slightly different for us though because she is at uni, and we are having a bit of an open relationship....where she doesn't want to go and see guys...and I do...lol

that actually sounds really harsh....but thats the way things are at the moment....theres more to it than that but not going into detail...

What Carisma said is actually very true....