It is a lot - not the number "6", but that he is unwilling with you. I think 6 is even a high number as an absolute figure - meaning, if an unpartnered guy ejaculated 6 times each day, I would wonder when he finds time for everything else in his life, but a partnered guy preferring ejaculating to porn to having partner sex is egregious. I have no advice as I have never been in your situation, so I just want to validate your expectations as normal and suggest that what he is doing is not normal.