My Mailman, My Pimp?

I just checked my mailbox for my apartment here in Japan for the first time, it was all junk mail except for one random photocopy of a photo of a beautiful topless blond white woman with a phone number. I either managed to pick up an incredibly beautiful woman without meeting her, in which case I have skills I never knew I had, or there is a shaddy mail based pimp in my neighborhood. The odd thing is that the mail box requires a key to access it, so theoretically the mailman and I are the only people who can get into the box, so I guess that means my mailman is also a pimp?