Watching porn together..

My boyfriend has brought up watching porn together and I’m not fond of the idea. He’s never really been the type to watch porn, but he has been recently and mainly in a experimental way so he can try new things. I told him I’m not sure how I feel about it but should I just try it? I never watch porn to begin with (I’m not against it, but not my thing) and i have a feeling that watching him jack off to another woman on porn is going to bother me. When he watches it on his own time, great but why with me. How do you feel about watching porn with your man?