I found pictures of girls in my bf (of 2 years of relationship) in his laptop?

I was using my bf's laptop to send job applications and had accidentally click delete on my résumé so I went to his 'trash folder' to retrieve it . Then I saw a pic of a girl which looked like its been sent to him . Wearing a tank top with massive cleavage .
Then there's this other folder that he had deleted that was named "no don't" and it that folder he had loads more pictures of naked girls . Thing is with him, everytime I come around he tells me he needs to delete his history in his laptop because he's ashamed I would see what kind of porn he watches . So when I confronted him , he said the only picture of that one girl was sent by his guy friend via Skype but when I asked him to prove it to me he said he can't . How would he feel if I had pictures of naked men in my phone and when confronted, I'd just make up some excuses . We've been together for 2 years and I feel like I'm not satisfying him . I feel quite disgusted to see those pictures . I don't exactly pay no mind to the folder of naked girls but just that one pic outside the folder which looked it was sent to him from that girl . It's driving me nuts I feel so unsafe and confused .

Tell him and explain everything to him and the way you feel about it. Just talk to him. Hope things work out.