Unknown numbers in his phone?

Do you think that your significant other should know who you talk to? Like texting, or on chats. If they don't ever tell you about who they talk to, like if it's an old friend, or a female I don't know, is that bad? I see random numbers in his phone when he opens his messages. They're unsaved numbers. I don't know how to feel. I don't go through his phone. Even if I wanted to, his fingerprint is the only thing that can open it.. I think I'm just being paranoid because my ex cheated on me, and it destroyed me. Just don't want to feel that way again... Any advice would be great. Please.
Unknown numbers in his phone?
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