He wants to have unprotected sex. Is it unreasonable for me to ask to look through his phone before we take that commitment?

I have a friends with benefits who is asking to start a relationship because he wants to try unprotected sex. Im pretty sure he is lying in order to have raw sex. Is it unreasonable for me to ask to look through his phone before i take that massive risk?

He wants to have unprotected sex. Is it unreasonable for me to ask to look through his phone before we take that commitment?
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