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If oral sex is more important than your loved one, well then, yeah. You shouldn't be with that loved one.
Relationships are about compromise. If porn is an important part of your lifestyle, and if it makes your SO feel really uncomfy, maybe it wasn't meant to be. But insisting your SO accept something that makes them very uncomfortable is not OK. If porn is more important than your partner's sexual comfort, well, that's a choice you make. If living a porn-free life is more important than your SO, that's also a choice.
Sometimes acceptable compromises can be reached. People can work out happy (or at least moderately satisfied) mediums. If they can't, they shouldn't be together.
It isn't a question of "reasonable" or "unreasonable", it is a question of "compatible" or "uncompatible".