He keeps stuff of his exs?

I found a blue folder that my bf ex from hs has made for him. Inside the folder she posted pictures of him, pictures of her in her underwear, wrote poems, and had like a 3 page story about a time they had sex. I know WOW. i asked him and he said they dated for 2 months and it was nothin special. Then in another closet i found a bag of jewlery and i threw it out. OOOPS im guessing that was from another ex. But I didnt ask him. he is very into his privacy and does not feel comfotable opening up. I asked him y he didnt throw the folder out and he said just b/c....idk its fishy to me