Found nudes on his phone...

I pretty frequently send my boyfriend booty pics because he really likes them & the other day i took some on his Snapchat On his phone (I completely trust him with them and know he would never show anyone so it wasn’t a huge deal.) but today i went to take some more & noticed the others were gone so i checked his “my eyes only folder” just to see if he deleted them or kept them & i found A LOT of pictures of tits & asses. They were in his Snapchat so does that mean another girl took them on his phone or did he save them there? I know i shouldn’t have been going through his phone but now i feel extremely insecure. Should i confront him about it? Please tell me how you’d react if you found nudes on your SO phone.