I (27F) went through my boyfriend’s (29M) snapchat and found out he was sent videos by a girl of her masturbating and he saved them to his phone.

I’m pretty pissed off about this. Apparently this happened a while ago so i’m just now finding out about it, but when I confronted him about it, he basically said he was friend’s with this girl and they used to message here and there on just some cool friendly shit, and then I guess after a while she started developing feelings for him. She sent about 4 videos of her masturbating and he saved them to his phone. I asked him why did you save the videos, his excuse was basically I don’t know, I was being stupid, I was being a guy, etc. etc. but he claims that they were unsolicited and that he stopped talking to her after that happened. Honestly, I’m having mixed feelings about his answer and this makes me not want to trust him but I don’t know, and also i’m not sure I believe the videos being unsolicited. I just find it weird that someone would randomly send sexual videos if there wasn’t something going on between them, but that may be because I’ve never personally been sent sexual content unsolicitedly. I don’t have any textual evidence that something romantic or sexual has been going on between them since he didn’t save any of their conversations on snapchat, but still something feels very off to me. Am I tripping or thinking too much into this situation???