If you gf or bf go through your phone records or msgs...would you be ok with it?

The other day i got a call from my guy colleague's fiance, she saw my name on the recent phone calls on her fiance, my colleague's phone, so she wanted to check who I was...

I think she was suspicious since he called me at late night, but im on a business trip here in Korea so there is a huge time difference, so he had to call me at night, it was really purely related work nothing more. i explained to her all that...
And she said ok and hung up lol
just now i got a call from my colleague and he apologized to me lol
It was a bit awkward.

Anyhow, do you think it is ok to go through your gf/bf's phone? Would you let her or him to read your msgs or play with it?
If you gf or bf go through your phone records or msgs...would you be ok with it?
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