Boyfriend watching porn

Hey girls, so I was wondering if anyone else gets annoyed when your significant other watches porn? I get this may be stupid but it annoys me slightly and makes me really upset because all

I can seem to think is am I not enough? Oh she must be better looking than me or be better than me that’s why? And it kinda makes me really self conscious and he understands this but he still does it. Any advice or your opinions would be much appreciated thank you xox