Do I have a reason to be mad??

Okaaay so. Yesterday I was on my fiancé’s instagram & I noticed on his search history. He had searched up naked females, with their ass all out. I got so maaad. & I confronted him. He just stood quiet & didn’t say anything. Keep in mind I’m 15 weeks pregnant with our first baby, planning our wedding for June of 2020. & lately I’ve been telling him I’ve been feeling really ugly about myself (hormones) & he just goes ahead & looks at naked females (making me feel even uglier). Then, he got all mad & said I’m over exaggerating over something so small & that why am I so surprised if he’s a “man” & men do that. & I told him it may be small to him but to me it isn’t. I feel disrespected. & he doesn’t care. I just feel like he shouldn’t be doing something that he know will make me feel some type of way. If he “respects” me like he says he does, shouldn’t he respect me enough to not hurt my feelings ?