I wish I could have asked this same question several years ago (possibly 15 years, maybe more). I needed a root canal, but my regular dentist (who's my cousin's wife) doesn't do that, so she told me she'd call in a surgeon who specialized in that and gave me an appointment at the clinic for the next saturday, I believe. The clinic was normally closed that day, but her assistant would come to open it so I could have the surgery performed on my tooth. I arrived a bit early and while I was waiting, a blonde girl about my age carrying a suitcase showed up. A while later, my dentist's assistant arrived, and as we both approached the door, the girl asked me if I was the patient on whom she had to perform surgery (I had already suspected she was the surgeon). During the surgery, we were chatting about several things (among other things, her brother apparently had studied the same career as I did), and I complimented her, saying "well, not just anyone would spend so long working on someone else's mouth" to which she answered "well, thanks, most people don't appreciate it", and then she told me upon finishing "after this, you'll have to buy me dinner", and afterwards gave me her business card. I didn't know if she meant it seriously or was only joking. After I got out I waited a few minutes in front of the building to see if she was coming out or what, then I left. The next time I went by the clinic, my cousin's wife told me "I hear you got a girlfriend". "Huh? Shoudn't I have heard it if that was the case?" I honestly had no clue (and still haven't) whether she had been flirting with me or not... I still have that business card in my archive, BTW.