Does your SO watch porn??

I found a bunch of pages of porn open on my boyfriends phone last night and I asked him why he got very defensive as to why I was in his phone in the first place and never really answered me. He finally ended up saying he had it on standby in case I didn’t wanna have sex last night. I’m not sure why but it kinda hurt my feelings seeing all those pages open. I don’t watch anything but our own videos and haven’t since we got back together because looking at another man just does nothing for me so I guess him being able to look at other women to get off hurts me for some reason. I don’t wanna be hurt by this cause it’s literally so stupid but idk how not to be.