When this man is concerned that he may have offended his gf, he asks Reddit:
GF and I were having dinner at a restaurant when she got a text from her best friend (who recently gave birth), and she said "omg she got a C section."
she works as a nurse so she then explained to me the type of incision they make for that and how it'll leave a scar.
I then, as a joke, said "at least she'll still be tight down there." My GF looked confused and then said that was a weird comment to make about her friend.
I then said it is a very normal joke to make and she disagreed. TLDR there was some back and forth, i asked her to drop it and she kept trying to talk about it.
I said to her "youre so insecure" and she then goes "does it make you feel good to call me that?" so then I got really frustrated, got up, and walked out of the restaurant and drove home.