Upset over this ..

So I was on my fiancés phone, using YouTube. Watching numerous pregnancy vlogs as usual bc we are expecting our little one come June 16th. Anywho I just started to look through his video history, nothing much before but then I came across "how to make love to a woman" videos. I thought it was pretty cute to find that he's been searching that up. However I then came across twerking videos of woman shaking their asses & Etc. & also compli.. Whatever videos of them all put it one. Next I came across how to make artificial vaginas & shit. Whoa, wtf. So then I go through his apps that were downloaded before but no longer on his iPhone & there were dating apps. We've been together for 2 years now, going on 3 currently. I feel a bit fucked up, insecure & upset over all this shit. Should I say something to him about it? Or just keep quiet and let it bother me. Like why can't he have me twerk for him instead of watching other videos like that and so forth. I'm hurt & idk what to say or do next to him ...